I do not look forward to the video leaker being identified

It is an excellent video, and authentic.

But whoever filmed it is probably not someone I'd enjoy seeing interviewed on TV as the ""face" of the video because he/she is probably not wrapped quite as tightly as might be desirable.

David Corn confirmed that the source of the video is the same person who posted part of it on youtube under Rachel Maddow's name. (An account which was shut down after Rachel disavowed it.)

Ideally, one would prefer that the video speak for itself, and with this sort of story the messenger is sometimes conflated with the message.