How do I convert a certain codec?

Hello! Thank you, ladies and gents, for your very valuable, precious time--.

I would like to say that there is a video codec called FMVC that the application, GSpot, does not recognize (it says, "Unknown." Please see two attached screenshots).
I would like to convert this FMVC codec to the MJPEG codec as my .AVI video file will not upload successfully to You Tube. That is, my .AVI file has the FMVC codec that I'd like to convert--i.e., the codec--to the MJPEG codec instead, per the following recommendation(s) from You Tube:

".AVI - Many cameras output this format - typically the video codec is MJPEG..." (courtesy of You Tube).

I am new to much of this, and I would assume I have made some errors in terminology, analysis etc. I am sorry if this is the case. (Please take no offense at my computer's file path to the screenshots. Purely a personal sense of "humor--." Thank you--.)
Thank you.

Sincerely,
Matt Bohart


Note: This post was edited by a forum moderator to remove signature links on 09/09/2011 at 3:32 PM PT