diff --git a/blazy.js b/blazy.js
index 00af78d..94a5101 100644
--- a/blazy.js
+++ b/blazy.js
@@ -200,7 +200,7 @@
                rect.top <= viewport.bottom;
     }
 
-    function loadElement(ele, force, options) {
+    function loadElement(ele, force, options, parentCallback) {
         // if element is visible, not loaded or forced
         if (!hasClass(ele, options.successClass) && (force || options.loadInvisible || (ele.offsetWidth > 0 && ele.offsetHeight > 0))) {
             var dataSrc = getAttr(ele, _source) || getAttr(ele, options.src); // fallback to default 'data-src'
@@ -218,7 +218,11 @@
                     // due to bug introduced in chrome v50 
                     // (https://productforums.google.com/forum/#!topic/chrome/p51Lk7vnP2o)
                     var onErrorHandler = function() {
-                        if (options.error) options.error(ele, "invalid");
+                        if(parentCallback) {
+                            parentCallback(true);
+                        } else {
+                            if (options.error) options.error(ele, "invalid");
+                        }
                         addClass(ele, options.errorClass);
                         unbindEvent(img, 'error', onErrorHandler);
                         unbindEvent(img, 'load', onLoadHandler);
@@ -233,7 +237,8 @@
                         } else {
                             ele.style.backgroundImage = 'url("' + src + '")';
                         }
-                        itemLoaded(ele, options);
+                        itemLoaded(ele, options, !parentCallback);
+                        if(parentCallback) parentCallback(false);
                         unbindEvent(img, 'load', onLoadHandler);
                         unbindEvent(img, 'error', onErrorHandler);
                     };
@@ -251,16 +256,34 @@
 
                 } else { // An item with src like iframe, unity games, simpel video etc
                     ele.src = src;
-                    itemLoaded(ele, options);
+                    if(equal(ele, 'source')) {
+                        parent.load();
+                    }
+                    itemLoaded(ele, options, !parentCallback);
+                    if(parentCallback) parentCallback(false);
                 }
-            } else {
-                // video with child source
-                if (equal(ele, 'video')) {
-                    each(ele.getElementsByTagName('source'), function(source) {
-                        handleSource(source, _attrSrc, options.src);
-                    });
-                    ele.load();
-                    itemLoaded(ele, options);
+            } else { // a wrapper with tags inside that should be loaded at once
+                var childElements = ele.querySelectorAll('[data-src]');
+                if(childElements) {
+                    var counter = 0;
+                    var errorFlag = false;
+                    var childElementLoaded = function(failure) {
+                        counter++;
+                        if(failure)    errorFlag = failure;
+                        if(counter == childElements.length) {
+                            //if single elements couldn't be loaded and an error handling is specified, raise an error
+                            //otherwise proceed with success
+                            if(errorFlag == true && options.error) {
+                                options.error(ele, "invalid");
+                                addClass(ele, options.errorClass);
+                            } else {
+                                itemLoaded(ele, options, true, !errorFlag);
+                            }
+                        }
+                    };
+                    for(var i = 0; i < childElements.length; i++) {
+                        loadElement(childElements[i], force, options, childElementLoaded);
+                    }
                 } else {
                     if (options.error) options.error(ele, "missing");
                     addClass(ele, options.errorClass);
@@ -269,9 +292,9 @@
         }
     }
 
-    function itemLoaded(ele, options) {
+    function itemLoaded(ele, options, finishedLoading, allElementsSucceeded) {
         addClass(ele, options.successClass);
-        if (options.success) options.success(ele);
+        if (options.success && finishedLoading) options.success(ele, allElementsSucceeded);
         // cleanup markup, remove data source attributes
         removeAttr(ele, options.src);
         removeAttr(ele, options.srcset);
@@ -367,4 +390,4 @@
             fn.apply(scope, arguments);
         };
     }
-});
+});
\ No newline at end of file
diff --git a/blazy.min.js b/blazy.min.js
index 649abfd..0c74a10 100644
--- a/blazy.min.js
+++ b/blazy.min.js
@@ -1,6 +1,6 @@
-/*!
-  hey, [be]Lazy.js - v1.8.2 - 2016.10.25
+/*
+ hey, [be]Lazy.js - v1.8.2 - 2016.10.25
   A fast, small and dependency free lazy load script (https://github.com/dinbror/blazy)
   (c) Bjoern Klinggaard - @bklinggaard - http://dinbror.dk/blazy
 */
-  (function(q,m){"function"===typeof define&&define.amd?define(m):"object"===typeof exports?module.exports=m():q.Blazy=m()})(this,function(){function q(b){var c=b._util;c.elements=E(b.options);c.count=c.elements.length;c.destroyed&&(c.destroyed=!1,b.options.container&&l(b.options.container,function(a){n(a,"scroll",c.validateT)}),n(window,"resize",c.saveViewportOffsetT),n(window,"resize",c.validateT),n(window,"scroll",c.validateT));m(b)}function m(b){for(var c=b._util,a=0;a<c.count;a++){var d=c.elements[a],e;a:{var g=d;e=b.options;var p=g.getBoundingClientRect();if(e.container&&y&&(g=g.closest(e.containerClass))){g=g.getBoundingClientRect();e=r(g,f)?r(p,{top:g.top-e.offset,right:g.right+e.offset,bottom:g.bottom+e.offset,left:g.left-e.offset}):!1;break a}e=r(p,f)}if(e||t(d,b.options.successClass))b.load(d),c.elements.splice(a,1),c.count--,a--}0===c.count&&b.destroy()}function r(b,c){return b.right>=c.left&&b.bottom>=c.top&&b.left<=c.right&&b.top<=c.bottom}function z(b,c,a){if(!t(b,a.successClass)&&(c||a.loadInvisible||0<b.offsetWidth&&0<b.offsetHeight))if(c=b.getAttribute(u)||b.getAttribute(a.src)){c=c.split(a.separator);var d=c[A&&1<c.length?1:0],e=b.getAttribute(a.srcset),g="img"===b.nodeName.toLowerCase(),p=(c=b.parentNode)&&"picture"===c.nodeName.toLowerCase();if(g||void 0===b.src){var h=new Image,w=function(){a.error&&a.error(b,"invalid");v(b,a.errorClass);k(h,"error",w);k(h,"load",f)},f=function(){g?p||B(b,d,e):b.style.backgroundImage='url("'+d+'")';x(b,a);k(h,"load",f);k(h,"error",w)};p&&(h=b,l(c.getElementsByTagName("source"),function(b){var c=a.srcset,e=b.getAttribute(c);e&&(b.setAttribute("srcset",e),b.removeAttribute(c))}));n(h,"error",w);n(h,"load",f);B(h,d,e)}else b.src=d,x(b,a)}else"video"===b.nodeName.toLowerCase()?(l(b.getElementsByTagName("source"),function(b){var c=a.src,e=b.getAttribute(c);e&&(b.setAttribute("src",e),b.removeAttribute(c))}),b.load(),x(b,a)):(a.error&&a.error(b,"missing"),v(b,a.errorClass))}function x(b,c){v(b,c.successClass);c.success&&c.success(b);b.removeAttribute(c.src);b.removeAttribute(c.srcset);l(c.breakpoints,function(a){b.removeAttribute(a.src)})}function B(b,c,a){a&&b.setAttribute("srcset",a);b.src=c}function t(b,c){return-1!==(" "+b.className+" ").indexOf(" "+c+" ")}function v(b,c){t(b,c)||(b.className+=" "+c)}function E(b){var c=[];b=b.root.querySelectorAll(b.selector);for(var a=b.length;a--;c.unshift(b[a]));return c}function C(b){f.bottom=(window.innerHeight||document.documentElement.clientHeight)+b;f.right=(window.innerWidth||document.documentElement.clientWidth)+b}function n(b,c,a){b.attachEvent?b.attachEvent&&b.attachEvent("on"+c,a):b.addEventListener(c,a,{capture:!1,passive:!0})}function k(b,c,a){b.detachEvent?b.detachEvent&&b.detachEvent("on"+c,a):b.removeEventListener(c,a,{capture:!1,passive:!0})}function l(b,c){if(b&&c)for(var a=b.length,d=0;d<a&&!1!==c(b[d],d);d++);}function D(b,c,a){var d=0;return function(){var e=+new Date;e-d<c||(d=e,b.apply(a,arguments))}}var u,f,A,y;return function(b){if(!document.querySelectorAll){var c=document.createStyleSheet();document.querySelectorAll=function(a,b,d,h,f){f=document.all;b=[];a=a.replace(/\[for\b/gi,"[htmlFor").split(",");for(d=a.length;d--;){c.addRule(a[d],"k:v");for(h=f.length;h--;)f[h].currentStyle.k&&b.push(f[h]);c.removeRule(0)}return b}}var a=this,d=a._util={};d.elements=[];d.destroyed=!0;a.options=b||{};a.options.error=a.options.error||!1;a.options.offset=a.options.offset||100;a.options.root=a.options.root||document;a.options.success=a.options.success||!1;a.options.selector=a.options.selector||".b-lazy";a.options.separator=a.options.separator||"|";a.options.containerClass=a.options.container;a.options.container=a.options.containerClass?document.querySelectorAll(a.options.containerClass):!1;a.options.errorClass=a.options.errorClass||"b-error";a.options.breakpoints=a.options.breakpoints||!1;a.options.loadInvisible=a.options.loadInvisible||!1;a.options.successClass=a.options.successClass||"b-loaded";a.options.validateDelay=a.options.validateDelay||25;a.options.saveViewportOffsetDelay=a.options.saveViewportOffsetDelay||50;a.options.srcset=a.options.srcset||"data-srcset";a.options.src=u=a.options.src||"data-src";y=Element.prototype.closest;A=1<window.devicePixelRatio;f={};f.top=0-a.options.offset;f.left=0-a.options.offset;a.revalidate=function(){q(a)};a.load=function(a,b){var c=this.options;void 0===a.length?z(a,b,c):l(a,function(a){z(a,b,c)})};a.destroy=function(){var a=this._util;this.options.container&&l(this.options.container,function(b){k(b,"scroll",a.validateT)});k(window,"scroll",a.validateT);k(window,"resize",a.validateT);k(window,"resize",a.saveViewportOffsetT);a.count=0;a.elements.length=0;a.destroyed=!0};d.validateT=D(function(){m(a)},a.options.validateDelay,a);d.saveViewportOffsetT=D(function(){C(a.options.offset)},a.options.saveViewportOffsetDelay,a);C(a.options.offset);l(a.options.breakpoints,function(a){if(a.width>=window.screen.width)return u=a.src,!1});setTimeout(function(){q(a)})}});
\ No newline at end of file
+(function(m,g){"function"===typeof define&&define.amd?define(g):"object"===typeof exports?module.exports=g():m.Blazy=g()})(this,function(){function m(b){var c=b._util;c.elements=I(b.options);c.count=c.elements.length;c.destroyed&&(c.destroyed=!1,b.options.container&&p(b.options.container,function(a){q(a,"scroll",c.validateT)}),q(window,"resize",c.saveViewportOffsetT),q(window,"resize",c.validateT),q(window,"scroll",c.validateT));g(b)}function g(b){for(var c=b._util,a=0;a<c.count;a++){var d=c.elements[a],f;a:{var h=d,k=b.options;f=h.getBoundingClientRect();if(k.container&&D&&(h=h.closest(k.containerClass))){var t=h.getBoundingClientRect();if(r(t,e)){var h=t.top-k.offset,u=t.right+k.offset,l=t.bottom+k.offset,k=t.left-k.offset;f=r(f,{top:h>e.top?h:e.top,right:u<e.right?u:e.right,bottom:l<e.bottom?l:e.bottom,left:k>e.left?k:e.left})}else f=!1;break a}f=r(f,e)}if(f||x(d,b.options.successClass))b.load(d),c.elements.splice(a,1),c.count--,a--}0===c.count&&b.destroy()}function r(b,c){return b.right>=c.left&&b.bottom>=c.top&&b.left<=c.right&&b.top<=c.bottom}function y(b,c,a,d){if(!x(b,a.successClass)&&(c||a.loadInvisible||0<b.offsetWidth&&0<b.offsetHeight)){var f=b.getAttribute(z)||b.getAttribute(a.src);if(f){c=f.split(a.separator);var h=c[E&&1<c.length?1:0],k=b.getAttribute(a.srcset),e="img"===b.nodeName.toLowerCase(),u=(c=b.parentNode)&&"picture"===c.nodeName.toLowerCase();if(e||void 0===b.src){var l=new Image,g=function(){d?d(!0):a.error&&a.error(b,"invalid");v(b,a.errorClass);n(l,"error",g);n(l,"load",m)},m=function(){e?u||F(b,h,k):b.style.backgroundImage='url("'+h+'")';A(b,a,!d);d&&d(!1);n(l,"load",m);n(l,"error",g)};u&&(l=b,p(c.getElementsByTagName("source"),function(b){var c=a.srcset,f=b.getAttribute(c);f&&(b.setAttribute("srcset",f),b.removeAttribute(c))}));q(l,"error",g);q(l,"load",m);F(l,h,k)}else b.src=h,"source"===b.nodeName.toLowerCase()&&c.load(),A(b,a,!d),d&&d(!1)}else{var w=b.querySelectorAll("[data-src]");if(w)for(var r=0,B=!1,f=function(c){r++;c&&(B=c);r==w.length&&(1==B&&a.error?(a.error(b,"invalid"),v(b,a.errorClass)):A(b,a,!0,!B))},C=0;C<w.length;C++)y(w[C],c,a,f);else a.error&&a.error(b,"missing"),v(b,a.errorClass)}}}function A(b,c,a,d){v(b,c.successClass);c.success&&a&&c.success(b,d);b.removeAttribute(c.src);b.removeAttribute(c.srcset);p(c.breakpoints,function(a){b.removeAttribute(a.src)})}function F(b,c,a){a&&b.setAttribute("srcset",a);b.src=c}function x(b,c){return-1!==(" "+b.className+" ").indexOf(" "+c+" ")}function v(b,c){x(b,c)||(b.className+=" "+c)}function I(b){var c=[];b=b.root.querySelectorAll(b.selector);for(var a=b.length;a--;c.unshift(b[a]));return c}function G(b){e.bottom=(window.innerHeight||document.documentElement.clientHeight)+b;e.right=(window.innerWidth||document.documentElement.clientWidth)+b}function q(b,c,a){b.attachEvent?b.attachEvent&&b.attachEvent("on"+c,a):b.addEventListener(c,a,{capture:!1,passive:!0})}function n(b,c,a){b.detachEvent?b.detachEvent&&b.detachEvent("on"+c,a):b.removeEventListener(c,a,{capture:!1,passive:!0})}function p(b,c){if(b&&c)for(var a=b.length,d=0;d<a&&!1!==c(b[d],d);d++);}function H(b,c,a){var d=0;return function(){var f=+new Date;f-d<c||(d=f,b.apply(a,arguments))}}var z,e,E,D;return function(b){if(!document.querySelectorAll){var c=document.createStyleSheet();document.querySelectorAll=function(a,b,d,e,g){g=document.all;b=[];a=a.replace(/\[for\b/gi,"[htmlFor").split(",");for(d=a.length;d--;){c.addRule(a[d],"k:v");for(e=g.length;e--;)g[e].currentStyle.k&&b.push(g[e]);c.removeRule(0)}return b}}var a=this,d=a._util={};d.elements=[];d.destroyed=!0;a.options=b||{};a.options.error=a.options.error||!1;a.options.offset=a.options.offset||100;a.options.root=a.options.root||document;a.options.success=a.options.success||!1;a.options.selector=a.options.selector||".b-lazy";a.options.separator=a.options.separator||"|";a.options.containerClass=a.options.container;a.options.container=a.options.containerClass?document.querySelectorAll(a.options.containerClass):!1;a.options.errorClass=a.options.errorClass||"b-error";a.options.breakpoints=a.options.breakpoints||!1;a.options.loadInvisible=a.options.loadInvisible||!1;a.options.successClass=a.options.successClass||"b-loaded";a.options.validateDelay=a.options.validateDelay||25;a.options.saveViewportOffsetDelay=a.options.saveViewportOffsetDelay||50;a.options.srcset=a.options.srcset||"data-srcset";a.options.src=z=a.options.src||"data-src";D=Element.prototype.closest;E=1<window.devicePixelRatio;e={};e.top=0-a.options.offset;e.left=0-a.options.offset;a.revalidate=function(){m(a)};a.load=function(a,b){var c=this.options;a&&void 0===a.length?y(a,b,c):p(a,function(a){y(a,b,c)})};a.destroy=function(){var b=a._util;a.options.container&&p(a.options.container,function(a){n(a,"scroll",b.validateT)});n(window,"scroll",b.validateT);n(window,"resize",b.validateT);n(window,"resize",b.saveViewportOffsetT);b.count=0;b.elements.length=0;b.destroyed=!0};d.validateT=H(function(){g(a)},a.options.validateDelay,a);d.saveViewportOffsetT=H(function(){G(a.options.offset)},a.options.saveViewportOffsetDelay,a);G(a.options.offset);p(a.options.breakpoints,function(a){if(a.width>=window.screen.width)return z=a.src,!1});setTimeout(function(){m(a)})}});
\ No newline at end of file