How to watch Youtube fullscreen on one monitor of a dual-monitor display?

Finally I stumbled upon a very easy solution:

• Go to a video on YouTube, in this example I am going to use http://www.youtube.com/watch?v=6v2L2UGZJAM

• Modify the link slightly (this works with ANY video on YouTube)

  From: http://www.youtube.com/watch?v=6v2L2UGZJAM
  To: http://www.youtube.com/v/6v2L2UGZJAM

• Enjoy your video!

You can also press F11 if you want to toggle between fullscreen mode (in your browser, not the video itself) which will increase the size of the image slightly.

This is the default behavior of Flash in a browser, and you need to tweak Flash itself to work around the issue. I've had luck with FlashHacker in the past, and the dev now has a Chrome-specific version:

http://jmaxxz.com/index.php?option=com_content&view=article&id=94:drizzlychrome&catid=16:downloads&Itemid=32