how to get better quality

I'm using macromedia flash 8 and below is an exported test run. You don't need to see the entire video. Once you have seen the first few seconds, you have seen the entire video. One reason behind the test was just to see if I could load more than 10 minutes onto youtube. The other reason is I wanted to see how bad the quality was and obviously the Mario sprites look hidious. Its an AVI file. The picture files ive used mostly seem to be gif and bmp. How can I export something with much better quality while still being the right file to load on to youtube since you can't just load up any type of file.






http://www.youtube.com/watch?v=LFVvx...ature=youtu.be