Great – but you need to get the aspect ratio correct. It’s obviously widescreen, but is playing at 4:3.

There are free fixes around the Internet for use with Windows Movie Maker that can help do the conversion.

Actually, though, I think YouTube have changed the standard to 16:9 anyway (which explains the black bars left and right on your videos and the black bars left, right, top and bottom on my older contributions) – and you might just need to get it off the camera (or other source) correctly.