I've been able to see belly kicks since 20 weeks, but I'm NEVER able to get a good kick on camera, since getting up to GET the camera makes Caleb stop moving. lol
Only watch this video for the first 10 seconds, because the rest doesn't contain any good kicks (that you can see, anyway). The best kick happens at about 3 seconds in, and then a couple seconds after that. Both kicks happen before I say, "That's all Caleb." I've seen better movement than this, but this is what I managed to catch!
YouTube - First baby belly movements at 25 weeks!