Although returning to the current video after session timeout is a great idea (and I upvoted), I think the overall site timeout for logged in users is too short. I often have to step away and when I return I have almost always lost my session (1 hour or so). I would request a 2 hour session timeout. This would eliminate the return to video in progress issue for most cases. When session timeout is noted, you should receive the simple login popup, click once to start the session and then return to where you were on the site. If you can return to the video in progress at the time point you paused, even better.