More recently, your posts look ok, so I've unbanned the account. It would be good if you'd post fewer unsubstantive comments, though. Also, please use hn@ycombinator.com to ask us questions like this—for two reasons: (1) the odds are high that we won't see a question if you post it here; and (2) it's offtopic in the threads.
Also, it looks like I can post new URLS, but now I am shadow banned instead of being banned.
Your recent submission https://news.ycombinator.com/item?id=31879076 was killed, but not because your account was banned. Rather it was because youtube.com submissions from new accounts get killed, because so many of those are spam. I've restored your submission now.