Simplified Universal Player Encoder & Renderer. a.k.a. Super (c) from Erightsoft is a free converter for audio and video formats. If you need to convert a .mod video into .wmv this is your software.
If the QuickTime .mov is giving you fits Super (c) can flip it over to .avi if that is the format your video editing software likes better.
Super(c) is a potent tool; you can change frame rates, size, audio bit rate and a bunch more stuff.
Newbies can use the software but it takes a little orientation to get up and running. This is a seven minute video by The Kane Guy that will get you familiar with the program.
To be on the safe side only download this program from the Erightsoft web site. The software is free and you don't need to worry about downloading a corrupt or virus laced version from some other web site.