Why not? Just using an app support YouTube background playing then anything you list can be done, one press on the Home button is not too many steps away from push up right?
Anyway you had totally missed my point, this feature has nothing to do with real-time, multi-task feature of bb10 otherwise it can't be easily achieved on other platforms. To claim this due to the real-time, multi-task feature of bb10 is like me saying other platforms have biometic sensors so they are more personal cos the phone recognize you better - and you are defending this kind of ill logic, way to go bro.
And yes app is important, it's the definition of smartphone. Why you think blackberry trying so hard to seduce developers AND provide android runtime?
Oh I wonder if googling an apk and manually install it is too many steps for the mighty OS? It's funny to meet a stereotype of fanboy outside of crackberry armchair CEO session lol.