Caching youtube on LAN [duplicate]

Possible Duplicate:
How can I cache YouTube videos with Squid Cache?

I am an Administrator for a net cafe. We have limited monthly traffic allowance and in past our investigations showed that 100 out of 500 videos are repeated. I am looking for any way to cache youtube videos on our server so users can watch the same video from our servers. I have tried Squid and searched a lot but nothing helped me. If there is something anyone can suggest I will be very thankful, as this had become a headache for us.

Solution 1:

http://cachevideos.com/ appears to be what you want.

AFAIK you are not supposed to cache youtube vids, youtube don't like it. I don't understand why.