Webcam Frustration

For some unknown reason my webcam stopped working properly. I tried reinstalling everything, I played around with it and it just refuses to cooperate. Every file saved has misplaced sound, so badly that I can't just move it so it fits the first 30 seconds because then it won't fit the last 30 seconds. I need to cut it into tiny pieces and then move it around... it's time consuming and annoying like hell... here you can see how a recorded video looks like before I do anything with it...