I frequently watch filler content instead of listening to music. So most of the day Wild Earth safaris on YouTube are playing. However when there is a live event like sporting events I would love, during game stoppage, to be able to instantly flip back to that Safari during commercials or halftime. You can do this with a cable DVR, going back and forth between Live and a DVR show you are watching. Maybe holding down the Back button would be the intiator. As it is, I have to rebrowse the other content. Does anyone else do this? I think it would be a great addition.
What device are you using?
The Nvidia shield can do this (double press home button to switch between apps).