That's what the copy says on the article Larry linked to.
This is also why I think it would be much better to do something like this with a mirrorless camera like the Nikon Z line.
In fact, we used to do something similar to this, with a PL mount adapter and the Panasonic Lumix GH-1 camera when it first came out. There was a group who hacked the software. I used to mount Cooke Speed Panchros (cinema lenses from the 1950's & 60's) on that GH-1 (with the PL mount adapter) and it made some very nice images, and video too. There was talk of shooting an entire film with one of those cameras and cine lenses, but I'm not sure anything ever came of that.
I agree with you, it's kind of an odd thing to do with a rangefinder camera, but the live view allows it to function properly. Again, I think this is going to be used as a premium from certain studios to give as gifts to directors & DP's who bring in lots of cash.
Best,
-Tim