I have used StereoTube on my PlayBook quite a few times and now it is available for BlackBerry 10. StereoTube makes it easy to create playlists combining songs on YouTube and your own personal collection. It works well and lets you tap into the millions of free songs on YouTube. Sadly BlackBerry forced the developer to cripple StereoTube’s ability to download YouTube videos which was available previously. This censorship by BlackBerry is one of the things that bothers me with BlackBerry World being the only storefront for BlackBerry 10 apps.
Either way StereoTube is still an awesome app for BlackBerry 10 which is available for $2.99 in BlackBerry World. That is 25% off due to the relaunch after BlackBerry pulled the app from BlackBerry World.