I've gotten about 15 dvds from my HS games this year.
Step 1 is to 'rip' the dvd... that is to convert it to an .m4v file. I use the open source utility HandBrake to do this.
Step 2 is import the .m4v file into iMovie.
Step 3 is to 'clip' plays in iMovie and export as .m4v files. I prefer the "real-time","real-time", "slow motion" format.
Step 4 is to upload to the web. I upload to Dropbox and share files there via Facebook with local officials. JetMetFan and APG share by uploading to YouTube.
I'm no wiz at it, but its pretty straightforward.
Ends up like this:
http://db.tt/wTUVzR67