Record an unity web game session and save it as a movie?

Hi,

i want to know if its possible to record a web unity game session on the fly.
After that the player can download that session as a movie (to improve his gameplay eg).

Does that work?
Thanks for your help.

A previous, identical, question had the following answer.

http://answers.unity3d.com/questions/24146/can-i-tell-unity-to-record-a-video.html

They did not think it possible.