The site is exploding in popularity so there's now an official URL (www.ytunblocker.net) and I added a few changes to the main page.
Some questions I've received:
"Can you unblock ALL websites?": This is very difficult due to how some web filters work. Some look for any connections to a forbidden site and instantly block the page. I'll look into it more but don't expect anything.
"My school blocked it": With this information I can not do much. However, if the school adds my site to their web filter, it's impossible to get around. However, you can still use the bookmarklet on the main page. If the school blocks youtube-nocookie, however, there is nothing more I can do.
I'm always open to more suggestions.
Thanks for using my site.