Animations on YouTube

Hi, I'm trying to create some simple animations in RAVE 3 and post them on YouTube.  My problem is that it seems like no matter what format (avi or mov) I export the animation in, when I upload it to YouTube it looks blurry.  I've also tried converting the exported files into other different formats (mp4, flv) and have the same problem.  Has anyone uploaded a RAVE animation to YouTube with success?  Other animations on YouTube look clear, so I'm not sure why there's a problem here.