diff --git a/src/main/java/com/iab/openrtb/request/Audio.java b/src/main/java/com/iab/openrtb/request/Audio.java
index 58901a625b3..3f1fccce76b 100644
--- a/src/main/java/com/iab/openrtb/request/Audio.java
+++ b/src/main/java/com/iab/openrtb/request/Audio.java
@@ -81,7 +81,7 @@ public class Audio {
      * within a bid request share the same podid, this indicates that
      * those impression opportunities belong to the same audio ad pod.
      */
-    Integer podid;
+    String podid;
 
     /**
      * The sequence (position) of the audio ad pod within a
diff --git a/src/main/java/com/iab/openrtb/request/Banner.java b/src/main/java/com/iab/openrtb/request/Banner.java
index b24584b110b..3f34ab3ea21 100644
--- a/src/main/java/com/iab/openrtb/request/Banner.java
+++ b/src/main/java/com/iab/openrtb/request/Banner.java
@@ -44,6 +44,30 @@ public class Banner {
      */
     Integer h;
 
+    /**
+     * Maximum width in device independent pixels (DIPS), retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of format.
+     */
+    Integer wmax;
+
+    /**
+     * Maximum height in device independent pixels (DIPS), retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of format.
+     */
+    Integer hmax;
+
+    /**
+     * Minimum width in device independent pixels (DIPS), retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of format.
+     */
+    Integer wmin;
+
+    /**
+     * Minimum height in device independent pixels (DIPS), retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of format.
+     */
+    Integer hmin;
+
     /**
      * Blocked banner ad types.
      * Values:
diff --git a/src/main/java/com/iab/openrtb/request/Content.java b/src/main/java/com/iab/openrtb/request/Content.java
index 486630d8eed..0419512c7a8 100644
--- a/src/main/java/com/iab/openrtb/request/Content.java
+++ b/src/main/java/com/iab/openrtb/request/Content.java
@@ -64,6 +64,16 @@ public class Content {
      */
     String genre;
 
+    /**
+     * Taxonomy used by genres. If omitted, Content Category Taxonomy 3.1 (9) is assumed.
+     */
+    Integer gtax;
+
+    /**
+     * Genre IDs from the taxonomy specified by gtax.
+     */
+    List<String> genres;
+
     /**
      * Album to which the content belongs; typically for audio.
      */
@@ -103,6 +113,12 @@ public class Content {
      */
     Integer prodq;
 
+    /**
+     * Video production quality retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of prodq.
+     */
+    Integer videoquality;
+
     /**
      * Type of content (game, video, text, etc.). Refer to <a href="https://github.com/InteractiveAdvertisingBureau/AdCOM/blob/master/AdCOM%20v1.0%20FINAL.md#list--content-contexts-">
      * List: Content Contexts</a> in AdCOM 1.0.
@@ -136,7 +152,7 @@ public class Content {
     List<String> kwarray;
 
     /**
-     * 0 = not live, 1 = content is live (e.g., stream, live blog).
+     * Indicates whether the broadcast is scheduled: 0 = on-demand, 1 = scheduled (linear viewing).
      */
     Integer livestream;
 
@@ -182,6 +198,16 @@ public class Content {
      */
     Channel channel;
 
+    /**
+     * Indicates whether the event is happening in real time: 0 = replay, 1 = real time.
+     */
+    Integer realtime;
+
+    /**
+     * Indicates whether this is the first broadcast of the content: 0 = no, 1 = yes.
+     */
+    Integer firstbroadcast;
+
     /**
      * Placeholder for exchange-specific extensions to OpenRTB.
      */
diff --git a/src/main/java/com/iab/openrtb/request/Data.java b/src/main/java/com/iab/openrtb/request/Data.java
index fd48b7100b8..49a1ee7b7a7 100644
--- a/src/main/java/com/iab/openrtb/request/Data.java
+++ b/src/main/java/com/iab/openrtb/request/Data.java
@@ -28,6 +28,11 @@ public class Data {
      */
     String name;
 
+    /**
+     * Extended video or audio content IDs from the source specified by name.
+     */
+    List<String> cids;
+
     /**
      * Array of {@link Segment} (Section 3.2.22) objects that contain the actual data
      * values.
diff --git a/src/main/java/com/iab/openrtb/request/Video.java b/src/main/java/com/iab/openrtb/request/Video.java
index 369d576a3ac..b476ee4c8fb 100644
--- a/src/main/java/com/iab/openrtb/request/Video.java
+++ b/src/main/java/com/iab/openrtb/request/Video.java
@@ -74,6 +74,12 @@ public class Video {
      */
     List<Integer> protocols;
 
+    /**
+     * Video protocol retained for OpenRTB 2.5 round trips.
+     * Deprecated as of OpenRTB 2.5 and removed in 2.6 in favor of protocols.
+     */
+    Integer protocol;
+
     /**
      * Width of the video player in device independent pixels (DIPS).
      */
@@ -90,7 +96,7 @@ public class Video {
      * within a bid request share the same podid, this indicates that
      * those impression opportunities belong to the same video ad pod.
      */
-    Integer podid;
+    String podid;
 
     /**
      * The sequence (position) of the video ad pod within a
diff --git a/src/main/java/org/prebid/server/protobuf/request/ProtobufRequestUtils.java b/src/main/java/org/prebid/server/protobuf/request/ProtobufRequestUtils.java
index b8d0a9ddebe..ff6ba262211 100644
--- a/src/main/java/org/prebid/server/protobuf/request/ProtobufRequestUtils.java
+++ b/src/main/java/org/prebid/server/protobuf/request/ProtobufRequestUtils.java
@@ -263,6 +263,10 @@ public static <ProtobufExtensionType> ProtobufMapper<Banner, OpenRtb.BidRequest.
             setNotNull(mapList(banner.getFormat(), formatMapper::map), resultBuilder::addAllFormat);
             setNotNull(banner.getW(), resultBuilder::setW);
             setNotNull(banner.getH(), resultBuilder::setH);
+            setNotNull(banner.getWmax(), resultBuilder::setWmax);
+            setNotNull(banner.getHmax(), resultBuilder::setHmax);
+            setNotNull(banner.getWmin(), resultBuilder::setWmin);
+            setNotNull(banner.getHmin(), resultBuilder::setHmin);
             setNotNull(banner.getBtype(), resultBuilder::addAllBtype);
             setNotNull(banner.getBattr(), resultBuilder::addAllBattr);
             setNotNull(banner.getPos(), resultBuilder::setPos);
@@ -337,6 +341,7 @@ public static <ProtobufExtensionType> ProtobufMapper<Content, OpenRtb.BidRequest
             setNotNull(content.getUrl(), resultBuilder::setUrl);
             setNotNull(content.getCat(), resultBuilder::addAllCat);
             setNotNull(content.getProdq(), resultBuilder::setProdq);
+            setNotNull(content.getVideoquality(), resultBuilder::setVideoquality);
             setNotNull(content.getContext(), resultBuilder::setContext);
             setNotNull(content.getContentrating(), resultBuilder::setContentrating);
             setNotNull(content.getUserrating(), resultBuilder::setUserrating);
@@ -768,6 +773,7 @@ public static <ProtobufExtensionType> ProtobufMapper<Video, OpenRtb.BidRequest.I
             setNotNull(video.getMinduration(), resultBuilder::setMinduration);
             setNotNull(video.getMaxduration(), resultBuilder::setMaxduration);
             setNotNull(video.getStartdelay(), resultBuilder::setStartdelay);
+            setNotNull(video.getProtocol(), resultBuilder::setProtocol);
             setNotNull(video.getProtocols(), resultBuilder::addAllProtocols);
             setNotNull(video.getW(), resultBuilder::setW);
             setNotNull(video.getH(), resultBuilder::setH);
diff --git a/src/test/groovy/org/prebid/server/functional/model/request/auction/Audio.groovy b/src/test/groovy/org/prebid/server/functional/model/request/auction/Audio.groovy
index 57d9bbd40ee..e262da95e35 100644
--- a/src/test/groovy/org/prebid/server/functional/model/request/auction/Audio.groovy
+++ b/src/test/groovy/org/prebid/server/functional/model/request/auction/Audio.groovy
@@ -14,7 +14,7 @@ class Audio {
     List<Integer> protocols
     Integer startdelay
     List<Integer> rqddurs
-    Integer podid
+    String podid
     Integer podseq
     Integer sequence
     Integer slotinpod
diff --git a/src/test/groovy/org/prebid/server/functional/model/request/auction/Content.groovy b/src/test/groovy/org/prebid/server/functional/model/request/auction/Content.groovy
index 7b49458a5fc..8e8f8b26c97 100644
--- a/src/test/groovy/org/prebid/server/functional/model/request/auction/Content.groovy
+++ b/src/test/groovy/org/prebid/server/functional/model/request/auction/Content.groovy
@@ -15,6 +15,8 @@ class Content {
     String season
     String artist
     String genre
+    Integer gtax
+    List<String> genres
     String album
     String isrc
     Producer producer
@@ -29,6 +31,8 @@ class Content {
     String keywords
     List<String> kwarray
     Integer livestream
+    Integer realtime
+    Integer firstbroadcast
     Integer sourcerelationship
     Integer len
     String language
diff --git a/src/test/groovy/org/prebid/server/functional/model/request/auction/Data.groovy b/src/test/groovy/org/prebid/server/functional/model/request/auction/Data.groovy
index 894ba61e4cf..9731712864e 100644
--- a/src/test/groovy/org/prebid/server/functional/model/request/auction/Data.groovy
+++ b/src/test/groovy/org/prebid/server/functional/model/request/auction/Data.groovy
@@ -10,6 +10,7 @@ class Data {
 
     String id
     String name
+    List<String> cids
     List<Segment> segment
     ExtData ext
 
diff --git a/src/test/groovy/org/prebid/server/functional/model/request/auction/Video.groovy b/src/test/groovy/org/prebid/server/functional/model/request/auction/Video.groovy
index 53e86c5ed28..e71191dc113 100644
--- a/src/test/groovy/org/prebid/server/functional/model/request/auction/Video.groovy
+++ b/src/test/groovy/org/prebid/server/functional/model/request/auction/Video.groovy
@@ -19,7 +19,7 @@ class Video {
     Integer width
     @JsonProperty("h")
     Integer height
-    Integer podid
+    String podid
     Integer podseq
     List<Integer> rqddurs
     VideoPlacementSubtypes placement
diff --git a/src/test/groovy/org/prebid/server/functional/tests/OrtbConverterSpec.groovy b/src/test/groovy/org/prebid/server/functional/tests/OrtbConverterSpec.groovy
index 21bb80df135..1615d173965 100644
--- a/src/test/groovy/org/prebid/server/functional/tests/OrtbConverterSpec.groovy
+++ b/src/test/groovy/org/prebid/server/functional/tests/OrtbConverterSpec.groovy
@@ -4,6 +4,7 @@ import org.prebid.server.functional.model.db.StoredRequest
 import org.prebid.server.functional.model.request.auction.Audio
 import org.prebid.server.functional.model.request.auction.BidRequest
 import org.prebid.server.functional.model.request.auction.Content
+import org.prebid.server.functional.model.request.auction.Data
 import org.prebid.server.functional.model.request.auction.Device
 import org.prebid.server.functional.model.request.auction.Dooh
 import org.prebid.server.functional.model.request.auction.DoohExt
@@ -32,6 +33,7 @@ import spock.lang.Shared
 import static org.prebid.server.functional.model.request.auction.Content.Channel
 import static org.prebid.server.functional.model.request.auction.DistributionChannel.APP
 import static org.prebid.server.functional.model.request.auction.DistributionChannel.DOOH
+import static org.prebid.server.functional.model.request.auction.DistributionChannel.SITE
 
 class OrtbConverterSpec extends BaseSpec {
 
@@ -556,7 +558,7 @@ class OrtbConverterSpec extends BaseSpec {
                 rqddurs = [PBSUtils.randomNumber]
                 maxseq = PBSUtils.randomNumber
                 poddur = PBSUtils.randomNumber
-                podid = PBSUtils.randomNumber
+                podid = PBSUtils.randomString
                 podseq = PBSUtils.randomNumber
                 mincpmpersec = PBSUtils.randomDecimal
                 slotinpod = PBSUtils.randomNumber
@@ -580,7 +582,7 @@ class OrtbConverterSpec extends BaseSpec {
                 rqddurs = [PBSUtils.randomNumber]
                 maxseq = PBSUtils.randomNumber
                 poddur = PBSUtils.randomNumber
-                podid = PBSUtils.randomNumber
+                podid = PBSUtils.randomString
                 podseq = PBSUtils.randomNumber
                 mincpmpersec = PBSUtils.randomDecimal
                 slotinpod = PBSUtils.randomNumber
@@ -604,7 +606,7 @@ class OrtbConverterSpec extends BaseSpec {
                 rqddurs = [PBSUtils.randomNumber]
                 maxseq = PBSUtils.randomNumber
                 poddur = PBSUtils.randomNumber
-                podid = PBSUtils.randomNumber
+                podid = PBSUtils.randomString
                 podseq = PBSUtils.randomNumber
                 mincpmpersec = PBSUtils.randomDecimal
                 slotinpod = PBSUtils.randomNumber
@@ -626,7 +628,7 @@ class OrtbConverterSpec extends BaseSpec {
                 rqddurs = [PBSUtils.randomNumber]
                 maxseq = PBSUtils.randomNumber
                 poddur = PBSUtils.randomNumber
-                podid = PBSUtils.randomNumber
+                podid = PBSUtils.randomString
                 podseq = PBSUtils.randomNumber
                 mincpmpersec = BigDecimal.valueOf(1)
                 slotinpod = PBSUtils.randomNumber
@@ -671,6 +673,43 @@ class OrtbConverterSpec extends BaseSpec {
         assert bidderRequest.imp[0].ssai == ssaiRandomNumber
     }
 
+    def "PBS should preserve content metadata for #distributionChannel when bidder supports ortb #ortbVersion"() {
+        given: "Content with genre taxonomy, broadcast flags and extended content identifiers"
+        def content = Content.defaultContent.tap {
+            gtax = 1
+            genres = ["genre-001", "genre-002"]
+            realtime = realtimeFlag
+            firstbroadcast = firstbroadcastFlag
+            data = [new Data(id: "provider-id", cids: ["content-001", "00042"])]
+        }
+        def bidRequest = BidRequest.getDefaultBidRequest(distributionChannel).tap {
+            it[distributionChannel.value].content = content
+        }
+        def service = ortbVersion == "2.5" ? prebidServerServiceWithElderOrtb : prebidServerServiceWithNewOrtb
+
+        when: "Requesting a PBS auction"
+        service.sendAuctionRequest(bidRequest)
+
+        then: "The bidder receives the content metadata unchanged"
+        def actualContent = bidder.getBidderRequest(bidRequest.id)[distributionChannel.value].content
+        verifyAll(actualContent) {
+            gtax == content.gtax
+            genres == content.genres
+            realtime == realtimeFlag
+            firstbroadcast == firstbroadcastFlag
+            data == content.data
+        }
+
+        where:
+        distributionChannel | ortbVersion | realtimeFlag | firstbroadcastFlag
+        SITE                | "2.5"       | 0            | 1
+        SITE                | "2.6"       | 1            | 0
+        APP                 | "2.5"       | 1            | 0
+        APP                 | "2.6"       | 0            | 1
+        DOOH                | "2.5"       | 0            | 1
+        DOOH                | "2.6"       | 1            | 0
+    }
+
     def "PBS shouldn't remove site.content.{channel, network} when bidder doesn't support ortb 2.6"() {
         given: "Default bid request with site.content.{network, channel}"
         def defaultChannel = Channel.defaultChannel
diff --git a/src/test/java/org/prebid/server/protobuf/request/ProtobufRequestUtilsTest.java b/src/test/java/org/prebid/server/protobuf/request/ProtobufRequestUtilsTest.java
index 29e092f73c8..8901b7d918f 100644
--- a/src/test/java/org/prebid/server/protobuf/request/ProtobufRequestUtilsTest.java
+++ b/src/test/java/org/prebid/server/protobuf/request/ProtobufRequestUtilsTest.java
@@ -361,6 +361,21 @@ public void bannerMapperShouldReturnValidMapper() {
         assertThat(result).isEqualTo(expectedResult);
     }
 
+    @Test
+    public void bannerMapperShouldLeaveMissingLegacyDimensionsUnset() {
+        // given
+        final Banner banner = givenBanner().toBuilder().wmax(null).hmax(null).wmin(null).hmin(null).build();
+        final ProtobufMapper<Banner, OpenRtb.BidRequest.Imp.Banner> mapper =
+                ProtobufRequestUtils.bannerMapper(formatMapper, givenJsonExtensionMapper(OpenRtbTest.banner));
+
+        // when
+        final OpenRtb.BidRequest.Imp.Banner result = mapper.map(banner);
+
+        // then
+        assertThat(result).isEqualTo(givenProtobufBanner().toBuilder()
+                .clearWmax().clearHmax().clearWmin().clearHmin().build());
+    }
+
     @Test
     public void nativeImageMapperShouldReturnValidMapper() {
         // when
@@ -410,6 +425,20 @@ public void contentMapperShouldReturnValidMapper() {
         assertThat(result).isEqualTo(expectedResult);
     }
 
+    @Test
+    public void contentMapperShouldLeaveMissingVideoqualityUnset() {
+        // given
+        final Content content = givenContent().toBuilder().videoquality(null).build();
+        final ProtobufMapper<Content, OpenRtb.BidRequest.Content> mapper = ProtobufRequestUtils.contentMapper(
+                producerMapper, dataMapper, givenJsonExtensionMapper(OpenRtbTest.content));
+
+        // when
+        final OpenRtb.BidRequest.Content result = mapper.map(content);
+
+        // then
+        assertThat(result).isEqualTo(givenProtobufContent().toBuilder().clearVideoquality().build());
+    }
+
     @Test
     public void deviceMapperShouldReturnValidMapper() {
         // given
@@ -811,6 +840,20 @@ public void videoMapperShouldReturnValidMapper() {
         assertThat(result).isEqualTo(expectedResult);
     }
 
+    @Test
+    public void videoMapperShouldLeaveMissingProtocolUnset() {
+        // given
+        final Video video = givenVideo().toBuilder().protocol(null).build();
+        final ProtobufMapper<Video, OpenRtb.BidRequest.Imp.Video> mapper =
+                ProtobufRequestUtils.videoMapper(bannerMapper, givenJsonExtensionMapper(OpenRtbTest.video));
+
+        // when
+        final OpenRtb.BidRequest.Imp.Video result = mapper.map(video);
+
+        // then
+        assertThat(result).isEqualTo(givenProtobufVideo().toBuilder().clearProtocol().build());
+    }
+
     @Test
     public void userMapperShouldReturnValidMapper() {
         // given
@@ -1158,6 +1201,7 @@ private static Video givenVideo() {
                 .minduration(1)
                 .maxduration(2)
                 .startdelay(3)
+                .protocol(2)
                 .protocols(singletonList(4))
                 .w(5)
                 .h(6)
@@ -1189,6 +1233,7 @@ private static OpenRtb.BidRequest.Imp.Video givenProtobufVideo() {
                 .setMinduration(1)
                 .setMaxduration(2)
                 .setStartdelay(3)
+                .setProtocol(2)
                 .addProtocols(4)
                 .setW(5)
                 .setH(6)
@@ -1343,6 +1388,10 @@ private static Banner givenBanner() {
                 .format(singletonList(givenFormat()))
                 .w(1)
                 .h(2)
+                .wmax(640)
+                .hmax(480)
+                .wmin(160)
+                .hmin(120)
                 .btype(singletonList(3))
                 .battr(singletonList(4))
                 .pos(5)
@@ -1360,6 +1409,10 @@ private static OpenRtb.BidRequest.Imp.Banner givenProtobufBanner() {
                 .addAllFormat(singletonList(givenProtobufFormat()))
                 .setW(1)
                 .setH(2)
+                .setWmax(640)
+                .setHmax(480)
+                .setWmin(160)
+                .setHmin(120)
                 .addBtype(3)
                 .addBattr(4)
                 .setPos(5)
@@ -1620,6 +1673,7 @@ private static Content givenContent() {
                 .url("url")
                 .cat(singletonList("cat"))
                 .prodq(2)
+                .videoquality(1)
                 .context(3)
                 .contentrating("contentrating")
                 .userrating("userrating")
@@ -1650,6 +1704,7 @@ private static OpenRtb.BidRequest.Content givenProtobufContent() {
                 .setUrl("url")
                 .addCat("cat")
                 .setProdq(2)
+                .setVideoquality(1)
                 .setContext(3)
                 .setContentrating("contentrating")
                 .setUserrating("userrating")