What you want is WMV, not WMA.... WMV stands for window media video while WMA stands for windows media audio.
You need not upload WMV to youtube. Youtube accepts many formats...
1) Download a DVD ripper online... google for one... there are many...
2) Typically the DVD ripper can save to WMV or MOV or AVI or MP4.... Youtube accepts them all. See
http://www.google.com/support/youtube/bin/answer.py?hl=en&answer=55744