I've had friends video tape me shooting in various competitions.
Invariably the first thing I say is: "Dang, I need to lose some weight, Honey do I really look that big?" Followed closely by "Gee whiz, I sure do look goofy when I run."
But I think that the video has really helped me. Sometimes it is easy for us to play mental tricks on ourselves. We shoot the stage and think, yep that sure was one slick reload. Until you watch the video and you realize that your "slick" reload looks like a walrus having a seizure.
Video has helped me find and correct a few flaws in my shooting.