This isn't a problem with a Blackberry. Everything can happen in the background, it was pretty handy when they came out with the new OS a few months ago.
Here's what you do:
Go on Youtube (on your iphone/ipod mobile device). Choose the select song and let the video load. Close your mobile device. At this point the song/video will stop (wait until it does). Press home button as if to just see the time (still on lock mode). Double press home button. Press play.
Your welcome !
Go on Youtube (on your iphone/ipod mobile device). Choose the select song and let the video load. Close your mobile device. At this point the song/video will stop (wait until it does). Press home button as if to just see the time (still on lock mode). Double press home button. Press play.