Opinion:
Bernoulli
Not trolling, but on BlackBerry devices you can play YouTube straight up from the background while doing something completely different on your screen, in case you needed the full screen to type or edit a document, send email etc, no need to minimize an app and make it widget size, on my windows phone you can even lock the screen and YouTube will still play on the background, this way you save battery, does the galaxy line up allow for the screen to be locked and still plays YouTube on the background?