I don’t think it’s a problem today. Traditional transcoders may be out of date, but it can be done in a breeze with the help of some free online or desktop applications - HD video converter free. Here are the representatives below..
Online conversion service:
clipconverter, onlinevideoconverter, online-convert, zamzar, convertfiles, etc.
Handbrake, Freemake, Anyvideoconverter, MediaCoder, Format Factory, etc.