Hello sassystuff
Welcome to the Gnutella forums!
The problem you describe is probably a CODEC issue. You can update your player by installing CODECs, or simply download and install VLC player, which is free and comes with all CODECs installed.
Here are more tips for getting good video (scroll down to the posts by Lord of the Rings):
http://www.gnutellaforums.com/downlo...ad-issues.html