So I have been getting black borders on my youtube channel videos and they go into moviemaker this way and I can fix it in moviemaker and I use Fraps to record.  My resolution in Movie maker is 16:9 and in my computer it is 1680x1050.  Please help me!

Some examples: https://www.youtube.com/watch?v=CWFJoHFDcAU <---- BLACK BORDERS

That is how they all are.  Please help!