First of all - it's a Virus.
Then.. i dont think there's any way to do an Speedhack without getting lagged back to your Start Position.
Do you dont think there would be any other SpeedHack for Guild Wars if it would work?
SpeedHacking is easy, but doesn't work in GW.
Video? For What? Just search an Location without many Vegetation, Monsters, Players.. then Sped Up the Video.. nice SpeedHack