The video in which Bin Laden "admitted fault" was later determined to be a hoax. The man playing Bin Laden is obviously younger and facial recognition software proved that it was not him.
For those who have never taken a course in Terrorism Awareness, you may be inclined to think that he cleverly avoided admitting to 9/11. NO terrorist would ever deny responsibility for what would have been a crowning achievement. The simple fact is that Bin laden was already on the FBI Most Wanted list and they may as well blame someone they are already after. $100,000 was wired to the lead 9/11 hijacker by the Pakistani intelligence department. This has been proven and the 9/11 Commission Report simply states that it is of little concern????
If anyone is interested, I have written a hub detailing some of this.