Two basic video tutorials made by Devils Haircut Visuals. Also available at: http://www.devilshaircutvisuals.nl/tutorials
One showing how to make black really black for better luma-keying and casually showing how to use ffdshows MJPEG codec.
The other showing how to use the 'append file' command to change te starting point of the loop.
Enjoy.

I assume you spend many hours on the computer or starring at a monitor from a few feet away. Believe it or not you could be causing harm to your body and your eyes. Not to mention the thousand clicks a day that your mouse and keyboard receive causing strain to your muscles. All that work and eyestrain can take a toll on your body and overall health.