I watch videos. I do not watch Mr. Happy though. I watched a few of his and I do not like them. I know that the videos however are not the key to being "pro", it just lets me know what to expect.

I personally think it helps. It is a extra tool that I use for learning. I can't say that it makes me a better player or even a bad player. I don't think that someone who doesn't watch the videos is bad at playing either. It is just a matter of learning perspectives.