u will see xul page error if u wonna youtube prewatch setting page.

now step1.(install remote-xul-manager)
https://addons.mozilla.org/ko/firefox/addon/rem...

step2. (add url in option)
url manager add "www.youtube.com"

step3. test . ok

I've did had some problems under Firefox 3.7 with this script,
in 3.6 it works flawlessly, also it seems that there is a small memory-leak that if you are previewing more then 5 videos at same time (for example using mouse over...)
you could halt your browser slightly (I'm too lazy to debug it with MS-fiddler nor using the debug output ohhhhhhhaaaaaaa() ).

One of the best script ever had !

Brilliant !!

THANK YOU VERY MUCH !!!

Yo, i love this one! I thought the preview would just show pics in a slideshow like with the other video previews, but I was surprised to see the video actually playing even with audio. It all works smoothly, really impressed man.
Yet another script to make my FireFox bad ass! Thanks.

~Des

very nice!

I do have a few gripes with this user script, but they are minor ones I can live with. I will be keeping this script installed. It's pretty awesome, as it adds a useful feature to youtube that I've been looking for.

I looooove it.
A "stay" button or something would be cool though. I know that the idea is just to preview but, for videos where the audio is more important than the image. I just would like it to stay playing and do other stuff with mi mouse.