/g 0.66
/l player playing

//TODO use playing: null to play first track
//TODO add console.log in error, next
//TODO check how players behave when loadVideo different players fast 1

//DONE reset currentTime, duration, index in players' stopVideo
//DONE show correct duration in soundcloud playlist
//DONE pass all data variables from observer to observable
//DONE implement native play/pause toggle in vimeo
//DONE use after to callback to observer