Teaching dog training, and doing dog training are two very different skills. Some people have an amazing ability to watch a team and point out areas for improvement. When I am working with my dog I have a different perception of what is going on. Over the last month I have been entered in a really fun tricks challenge, but it required me to video tape my dog working. When I look back at it, I can see areas for improvement. Its truly amazing.
I’m also on an email list for competitive dog obedience and I heard some similar responses there too, videoing your dog gives you a different perspective. I’m going to work on a few behaviors over the next few weeks and try to video them. I may not post all, but I will post some. I would encourage you to do the same! You may just learn something from your dog!