API functionality: ambiguity of 'maximum downstream media bit rate' assertion

[Kevsy]

Problem description

Querying the network for 'maximum downstream media bit rate' could be interpreted as:

1. the network bandwidth (maximum achievable throughput) for that device connection.
2. the network throughput to that device connection at the time of the request
3. the network throughput to that device connection estimated for the next DASH/HLS segment (e.g. 4-second forecast). Note that DASH calculates the next sequence representation one-at-a-time, not for the whole manifest in one go.
4. the network throughput to that device connection estimated for the entire video session (namely the value of the mediaPresentationDuration in the manifest, e.g. a 30 second or 5 minute forecast)

Expected action

Clarify which of the four is the correct definition in the description, and clarify the name 'maximum downstream media bit rate' as required (e.g. `Current maximum downstream media bit rate')

Additional context