I never said you had to be the best skateboarder ever, but if you suck then your video will suck too. If you didn't want to hear that then maybe you could of kept your video to yourself so in a few years when you hopefully have progressed you can look back and see how much you sucked.
basically my thoughts are why post videos when they are not really anything spectacular, at most post them in the video section. I feel this way because when I see a video in the forums i expect to see the next clown school not some punk skater kid who filmed his first kickflip over some crap music.