Nope, I successfully posted a youtube video yesterday.

(Nobody upmodded it though, which is a shame, cuz it was totally awesome.)

Not according to your list of submissions you didn't.

http://news.ycombinator.com/submitted?id=hugh3

It's there but [dead]. You have to change your preferences to show dead links.

Well shoot. I didn't get a "stop spamming" message.

For what it's worth, the video is called "The Kepler Orrery" and it's an animation showing all the multi-planet systems discovered by the Kepler mission so far, side by side, with the same length and time scale. It's pretty awesome.

As an experiment (and I wouldn't normally advocate this) try submitting it again, see if you get the message this time.

EDIT: Actually, having gone and found it, don't. It doesn't really contain any seinsible information that I can see - it just appears to be a lot of spinning circles, some music, and no real information about what you're actually looking at. It might be great, but it's impossible for me to see why.