Does anybody know where I could possibly it? I would be forever in your debt. 
Someone can correct me if Iām wrong, but I believe Source Film Maker is internal Valve software and has not been released to the public yet. Some people managed to get it from the TF2 beta files, so thatās about all I can say. If you do happen to find a copy, just know that downloading and using it is of questionable legality. If I were you, Iād just wait for an official Valve release.
Itās seen pretty widespread use on youtube, and its not gonna be released any time soon.
But thanks.
I believe Valve said that it would be released when they had made a āmeet the teamā video for each of the classes. I believe there are only two classes waiting for a video release.
Yeah, its not publicly released, although it was in the TF2 beta for a short while, but you canāt really get that any more.