There are 2 main freestyle organizations CFF... www.canine-freestyle.org
and WCFO... www.worldcaninefreestyle.org
. Since I was involved there could be more but these are the main ones. You tube has lots of video (good and bad) Carolyn Scott and Rookie (golden) Kate Nicholas and Gin (border collie) are fun to watch. My favorite trainer (clicker) is Emily Larlham She is young and new on the scene since I was doing freestyle but I like what I see. www.dogmammtics.com
or google kikopup. She has tons of training videos. It is really fun whether you are dancing in your living room or at competitions! It's all about the joy of training,and doing something with your best buddy!