24 hours after "This link ain't from YouTube hack" they fixed the problem

1. All old links have a "warning message" :

http://www.youtube.com/redirect?username=digitalhook&q=http%3A%2F%2Fsecuritytube.net%2FSocial-Engineering-Attacks-using-Simple-Redirections-video.aspx&video_id=Vgc3NVVpb8c&event=url_redirect&url_redirect=True&usg=UE0DOmwjBRK-mgheFtW1hMTEvh4=

2. All new links go directly to the real site. There is no redirection.

Thanks HN!