Simple video editing

I have some .MOD files that need the video replaced with a series of still shots, and some of the video edited. The YouTube video editor doesn’t seem to allow replacing the video with still shots. Is there something I can use without going to the expense of Adobe Premier?

Thanks. Once converted, what video editing tools do you recommend?

Corel Video Studio Pro X2, Roxio Video Lab , These are also very useful video software. Both software are not much expensive.

LoiloScope is an amazing product. You can use it for free (for an unlimited time, if I recall) but I was so impressed with it I purchased the inexpensive license.
It is flexible, quite user-friendly and recognizes many video formats.

It is only for Windows, however. Even though I am “a Mac guy” I use it in a VMWare instance.