You need to (should) fit the source video to the render frame. Make sure the project is the same resolution as the raw video.
Not bad, not bad at all! You should check out what myself and my YouTube partner put together for the first "Only in Battlefield 3" video competition! We actually won an honorable mention along with 4 others from DICE, but were unable to place in the top 10, so I guess you could say we placed in the top 15? https://www.youtube.com/watch?v=a2W1kC9rd7o&feature=plcp