It's been temporarily taken down but the author says it'll be back up soon. I only got a chance to watch the first part of the first act at work but it was pretty freakin' funny. I hope it's back up soon.
I got to watch the whole thing before it was taken off, and IT'S BACK!! It is SOOOO funny. I'm actually watching it again now, even though it takes about 2 hours to watch. They renamed it "A Very Potter Musical".
Seriously... you all HAVE TO watch this, it is the funniest thing I've seen in a long time. Go to the bathroom first, though, and be careful not to spit out whatever you're drinking. It's that funny!