After a long night, 2 hard drives a PSU fried Xboxyde is back. There were some losses, but nothing major. Some archived videos may never be back again, but that's it. I'll try to get some of them back during this week-end. I'll have to make another maintenance on the server next so the RAID is working again.
Update : Good news! I've just spent a big part of my week end on some heavy recovery on the almost dead hard drive that caused the crash the other day and I managed to recover almost every "home-made" videos there. The only thing I still can't recover are the first 10 minutes of Grabbed by the Ghoulies. I'll reupload everything in the next day. Wheeew :)