Video issues.

[Unwisersmile]

Okay, so I bought Amnesia a few months back and I installed it. I turned it on and the launcher popped up all fine and dandy, and after I clicked to play it, I heard Daniels whole thing but there was no video. I saw small light fluctuation, but that's it. I figured it was my screen so I just continued on with my life and got a new computer. I re-downloaded it just now and the same thing happened. Is this a common problem, or will I need to re-buy the game?