Funny and critical CS fan movie published in 2005 by Daniel P. Schenk. I would say it's an absolute classic and a must see for every old and new FPS fan. Although beeing a German video there should be almost no linguistical problems.
This is the HQ Remix with specially made soundtrack that does not cause any copyright problems (I accidentally uploaded the original at first and it got deleted immediately...).
The 5 minute preview only contains the prelude so the main action comes after that. ^^