// https://html.spec.whatwg.org/multipage/media.html#videotracklist
[Exposed=Window]
interface VideoTrackList : EventTarget {
    readonly attribute unsigned long length;
    getter VideoTrack (unsigned long index);
    VideoTrack? getTrackById(DOMString id);
    readonly attribute long selectedIndex;

    attribute EventHandler onchange;
    attribute EventHandler onaddtrack;
    attribute EventHandler onremovetrack;
};
