Don't forget to check any other tutorial and free download posts in this blog like How to Update to Android 2.1 ESE81 Manually.
If you can't open whether YouTube or Facebook from your computer in the school or office, I predict that your administrator has blocked those websites for any purposes. So the solution is you have to use a proxy for Facebook and Youtube (actually the proxy works for any other websites too).
Proxy is just being a channel between your computer and the web server, so you don't access Facebook or YouTube directly, that's why even your administrator has blocked those websites, you can still browse its page.
You can try one of the proxy listed below :
http://schoolmyspaceproxy.com/
http://www.dephyr.com/
http://unblocksiteproxy.com/
http://planetfirefox.com/
http://imgchat.info
http://helpbobnow.info
http://indiagov.info
http://internichelp.info
http://internichelpnow.info
http://lostfriend.info
http://techhelp999.info
http://trafficcure.info
http://usdocsearch.info
http://veryofficial.info
http://123better.info
http://123voipchat.info/
http://777dogone.info/
http://99person.info/
http://bettersurf.info/
http://myfindnow.info/
http://myknee123.info/
http://netadminstinks.info/
Have fun and good luck with those Proxy for Facebook and YouTube above. Please contribute to this article by letting us know if any of the above links is dead, or even if you find another proxy website. Just leave a comment, thanks!