Hi there,
Just saw this and would like to add my 2-cents as well. On my Web app, I have multiple embedded Twitter videos. What I would like to implement is the following:
- video automatically pause when it is out of view
- previous video automatically pause when i play another video.
Such things will not be possible without these:
- Ability to listen to play/pause events from the embedded player
- Ability to programmatically play/pause any embedded player
Would be totally grateful if Twitter can have this kind of features! Thanks! 
Kind Regards,
Sugi