Thank you guys!

This one

http://codecs.microsoft.com/codecs/i386/sg726acm.cab

worked for me, but since it did not allow me to resize, I tried

http://www.headbands.com/gspot/index.htm

and it worked better! I got resizing to work. The videos I have were created with a Panasonic SV-AV30.

Cheers!