I am running Gnome Shell 3.2 on Ubuntu 11.10 and Banshee 2.2. I sync Banshee with my iPod Classic 80 gb. I have enabled syncing music - sync entire library option and video syncing is set to manual. ...
Avi files placed in the Video folder show up almost immediately, but for some reason, mp4's do not. Movie Player will play the mp4's, so I don't think it is a gstreamer situation.