The read-only videoTracks
property on HTMLMediaElement
objects returns a VideoTrackList
object listing all of the VideoTrack
objects representing the media element's video tracks.
The returned list is live; that is, as tracks are added to and removed from the media element, the list's contents change dynamically. Once you have a reference to the list, you can monitor it for changes to detect when new video tracks are added or existing ones removed. See VideoTrackList events to learn more about watching for changes to a media element's track list.