A simple and quick script I wrote that adds a button to Youtube. Basically it moves the video to the left and you can toggle it back and forth. I made it so I could watch videos and have a chat program open next to the video at the same time. I realize that this is a pretty specific function,
which is why I'm not uploading it to userscripts.org, but instead I'm hosting it on dropbox.
Also here are some screenshots: