You stole my idea
I started digging on the gdata python bindings and was able to retrieve the information I needed, tried to play the video URL with gstreamer with no luck, I should try mplayer. It'll work for sure and better

But i do have other issues to solve first: my daily job.

Also I am not (yet) good at UI. Could someone post a mock up of the UI ? Big buttons, no particular effects (yet).