I have only just started doing AH films. I use the AH Film Viewer and save using the Cinepak Codec by Radius at 1280x720 and 30fps. I then import in to Sony Vegas Movie Studio 11 which I got cheap off Amazon (less then half the price of the official website).
Only issue is the lack of sound, so you have to add all the sound effects manually, which for my last one was quite a challenge and fun in itself.
I then save the movie as a 1280x720, 30fps mpeg-4, then upload to Youtube from my hard drive. The only thing I had to figure out was stopping the movie "resampling" my clips, adding blur. Once I sorted that it came out crystal clear.
Hope this helps.