Tube Jammer is a fun way to sing or play alongside your favourite artists on Youtube. Or if you prefer, maybe karaoke is more your style. It's useful for musicians wanting to play their own stuff too! Once your 2-track video is complete you can mix it down and share it with friends.
It would be awesome if it actually downloaded the videos... cool app idea but first time trying and doesn't give a good impression.
decent idea but too basic, needs some more functionality
It does mix down two videos to simultaneously play. However you have to mix two videos, and there is a huge program banner taking up 40% of the screen. But it does it, with a few technical options. Only good for doing exactly a two video mix down. (plus you can't even play your mixed down videos you have to open them in a different program). It's actually pretty lame.