whenver I convert videos from www.keepvid.com from youtube to .avi or .wmv it flips them upside down...
What converter are you using? I use SUPER and I've never had any problems. On the other hand, you can just get a video editor and flip the video vertically. I recommend Ulead Video Studio 10. You can get it at download.com but beware, its a RAM hog.
Download Super. http://www.erightsoft.net/S6Kg1.html Scroll down until you see the large download now buttons.