RSS doesn’t “fully” validate

I have the plugin:

http://www.viper007bond.com/wordpress-plugins/vipers-video-quicktags/

But, for some reason, RSS validators don’t like this plugin very much:

http://feedvalidator.org/check.cgi?url=http%3A%2F%2Fblog.trossenrobotics.com%2Findex.php%2Ffeed%2F

It looks like it is barking at trying to add youtube videos in my blog, but I’m not 100%.

Anybody have any ideas?