[FEATURE REQUEST] Customize additional event dispatching for video

[tungs]

Currently, video nodes still dispatches many events (canplay, etc), and timeweb only prevents some events (play and pause). Since video nodes that timeweb processes are always paused, and then seeked through to "play" them, this can create some unintended consequences. See tungs/timecut#55 for an example, where a canplay event is dispatched every single frame.

Video behavior may be further customizable by adding event listeners in addMediaNode and calling event.stopImmediatePropagation (or event.stopPropagation). That behavior is currently customized for play and pause events.

List of media events can be seen here. Of the list (abort, canplay, canplaythrough, durationchange, emptied, ended, error, loadeddata, loadedmetadata, loadstart, pause, play, playing, progress, ratechange, seeked, seeking, stalled, suspend, timeupdate, volumechange, waiting), only some of them are relevant. For each relevant one, it's likely that custom behavior needs to be defined and custom events need to be dispatched to restore intended behavior.