Well, I can't speak for you, but for me I cringe because the presentations are so often so, so bad. Not to mention the frequency with which people post videos that contain flashes or other mechanical errors that give away the method. There's absolutely no excuse not to post the best example of what you can do (multiple takes and all that), so I have to assume that what I'm seeing is the best that person can do. Which means they should spend that time practicing and rehearsing, instead of making videos.