Userscripts.org

I'd like to see it have a Button that enlarges or shrinks the video at will so if I just want to watch the video normal sized I can just hit the button, and vise-versa. Sort of what Veoh is doing right now. The larger player is nice but I wouldn't want it Big all the time especially when playing the Older Youtube videos who's quality isn't as good as more recent videos.

I very much want to second this. Youtube already has a resize button as default on alot of the premium content (the same sort of stuff that also normally gets the lights-out button) that resizes the video between the small (default, description on right) view and the "big mode" view.

If you made that button show up on every video, like you do the lights-out button, and make it toggle the script's existing "big mode" option (so that the video size would apply to any other videos watched afterwards, such as those in a playlist that Youtube's automatically working its way through), that would be perfect.