AbstractReadonlykindOptionalsidcurrent receive bits per second
Abstractisindicates current state of stream, it'll indicate paused if the track
has been paused by congestion controller
creates a new HTMLAudioElement or HTMLVideoElement, attaches to it, and returns it
attaches track to an existing HTMLAudioElement or HTMLVideoElement
Detaches from all attached elements
Detach from a single element
AbstractstartOptionalsignalClient: SignalClient
sid is set after track is published to server, or if it's a remote track