too many format names - MP4 720P H264 480i etc

Does anyone else have trouble trying to keep up with all the various video file format names?  As we discuss the BETA I am reading each posting that descibes


DIVX, AVI, H264, MP4, M4V, 720P, 720I, etc. etc.


trying to keep track of which file works, and if it works, and comments about them all must be a crazy task for the FIRECORE folks. 


Just had to say something.  And good luck to all those geek hobiest types out there trying to make sense of all this.