I'd like to clarify one thing...
People knowing that you're a part of the beta is not a major concern. In fact, it's not even hidden at all. If you're using a Windows/Xbox LIVE account to sign in (that's not news, it was mentioned months ago) then the Microsoft Flight Beta, including your aeroplane and mission, show up on your recently played games. So anyone on your friends list can see what you're up to. So I don't believe they're concerned about the confidentiality of who is playing the beta...
...However, discussion of the beta content is not permitted. There are official channels to report problems and to discuss changes in the game. SimV, Avsim, Youtube, Vimeo, etc, are not places. For the record, the videos have been spotted and have either been removed by the user or deleted because of copyright infringement against Microsoft.
So as I said earlier, the beta is out... But no questions, please.
I admit, I did the ground breaking on this hole. But lets just leave it at that? You'll appreciate it a lot more to see the game in its completed form.