I'm saying it's been proposed so many times that the bin Laden audio was forged and the "bin Ladens" in the video tapes are so different (fat/thin, young/old, impossibly alive) that they must be faked....
So you must also believe that all of Marlon Brando's movies are faked.
Seriously, as an individual goes through life their appearance changes. I'm not sure it's reasonable to conclude forgery. (Keep in mind that Al Queda has released the tapes whenever it suited them. And that does not necessarily mean in the order the tapes were created.)
My opinion is that I cannot trust anything that comes out of this White House and so if they say it's really him I'd rather flip a coin than take their word.
What if they say officially that: "We don't have any reason to believe that it's not him."? Remember, the U.S. government gets these tapes at about the same time we do.
It does not sound like you have a good reason to believe they're faked. I don't mean that snarky, it's just an observation.
I am still interested in any logical reason for believing that any of the tapes are faked.