I'm not trying to escalate this silly conversation but just going to clarify a few things and be done.
1. We tape the name on all of our cameras, except the REDs. Nearly every project some client or agencies video guys are shooting behind-the-scenes and most of our client's brands have issues showing big white logos.
If there is no tape on our camera's logos then it got pulled off by accident. When we shot that Phase gig, we just came off a project that had an agency still photographer and videographer documenting the Barcelona shoot so that's why the contax name was blanked out.
We weren't trying to trick anyone.
....
I don't doubt you at all. Often logos have to be hidden on props in films or ads. Some photographers also just don't like flashy white text waving in the models face.
However out of curiosity what do you think about the description PhaseOneDK used on the youtube posting of the video.

It's pretty clear:
"Phase One camera system:
http://www.phaseone.comWatch professional photographer James Russell working with the
Phase One camera system on a photo shooting for Phase One."
Click on the hyperlink, takes you to the phase one web site and this is the camera system there is the DF.
phase One Camera System This clearly would lead people to believe that what you say about being unbreakable even after your roughing the camera up etc is refereed to the DF.
I agree with you about the robustness of the P series backs.... built like little tanks, but the DF is far from robust or rock solid.
Mine would work for days on end and then out of the blue the wheel on the body or grip would no longer work.... remove lens... remove batteries... put it together again...
make up some excuse to tell the client.... put it back together again.. say a little prayer and it may come back to life.
The p25+ back on my Fuji gx680 worked all the time.
Yea as you say I could have tested one before, but that would have made little difference because the freeze attacks might not happen for days.
Anyway I just want to repeat that I'm not saying you did anything fishy. I probably should have made that more clear from the get go.