Converting .dv files to another compressed file type for upload to youtube

I got video files on a disc of my old band performing. they are in the .dv format and most of them are about 800 mbs in size. So, i need to convert them to a youtube acceptable format and compress them to 100 mbs.

So ive been downloading video converters for the past hour, realizing that you have to pay to use them or they do not convert .dv files

Can soemone please help me?