It seems that hackers, seeing the widespread use of Flash on the Internet, have decided to insert viruses into some Flash videos (YouTube included) to control and infect our systems.
And, there are also many websites that load the video even before you press Play, so it´s very useful to have a tool like Flash Disinfector 1.0 which is an antivirus that analyzes and cleans these Flash viruses looking for viruses and worms like W32/Perlovga (copy.exe | host.exe), VBS_RESULOWS.A (Hacked by Godzilla, Hacked by Moozilla), etc.