Video player incorrectly reports time/duration for sub-sections of videos

[bmtcril]

When using the "advanced settings" to display only a subsection of a Youtube video, the video player sends the duration of the entire video to the tracking logs. It also uses currentTime values relative to the full video time.

For instance, the new demo course has a video in module 2 / "advanced video settings" titled "The Reach of the Open edX Platform (2023)". When watching this video the initial play of the video starts at currentTime of ~700 and duration of 2990, where for reporting purposes we would expect. currentTime to be 0 and duration to be 87. At the start of the video, the controls UI show 11:30/12:57.

This causes downstream reporting errors where video watch and completion rates are incorrect, since the system has no way of knowing the actual duration of the video being displayed (or the offsets from the original).