Why can't I open a video into Windows Movie Maker? best answer will be chosen*?

Yes, the format has everything to do with it. I took videos on my mom's Canon for a school project not to long ago & I had the same problem. The converter I used is called Prism Video File Converter. Go here (http://download.cnet.com/1770-20_4-0.html?query=nch+video+converter&platformSelect=Windows&tag=srch&searchtype=downloads&filterName=platform%3DWindows&filter=platform%3DWindows) & scroll down. You'll see it.