There is no detailed external version of the documentation for media Telemetry harness.
Googlers can find the internal documentation here: http://go/videostack-chromeperf-sheriff
The media benchmarking harness consists of the media story set, and the media metric. Those two elements are brought together by the media benchmark.
The media story set is a set webpages along with instructions for automating interactions with them. The media story set consists of two types of stories: src= stories and MSE stories. The src= stories simply run a saved media file from start to end. The MSE stories directly call various MSE APIs.
The media metric takes in a trace file and computes various metrics such as seek time and time to play using the trace events.
