I've used my cell phone to take video and that has worked well. Ive taken video of my kids to help show them what they are doing right or wrong. I have even posted those said videos to the forum for some of the.better riders help point out things I missed
So you don't need to spend money if you don't want to, to accomplish what you are trying to do.
-I'm Slyder and I suffer from "Gummer Syndrome"