[38 coupe]

I clicked on the video with the sound turned off, and looked at the car. I skipped the parts where the presenter did a lot of talking, and paused the video when something interesting about the car was on screen. This way I can make my own judgement based on the vehicle only. To me it looks like a 1950 Ford tudor that was owned and driven by someone who liked 1950 Fords and collected some memorabilia. The mileage doesn't really matter, it is the condition that counts (and for all we know the odometer may be broken). The condition of the car is not special: the engine appears to have been replaced, the paint is poor, and the interior is very used. Some of the mechanical parts are interesting, particularly the oil pan with the clean-out.
My guess, and it is just a guess, is this was a police car. Then it was sold off and owned by someone who liked 1950 Fords. That person drove the car as transportation and added stuff like the extra trim and seat covers from J. C. Whitney or a similar establishment. At some point the engine got replaced with a 52-53 Ford long block, and the parts particular to this car like the intake, oil pan, and exhaust manifolds, got re-installed. All of this is typical of a used car driven by an owner that cared about their car. At some point the car was parked in a garage. Then this youtube person found the car and decided to make a video with claims that probably can't be substantiated. It is an interesting car, with parts that are not common (that doesn't mean valuable). That combination does not support the claim of rarest 1950 Ford. Youtube promotes dramatic claims, and this is one of many on that site.
These are just my observation. your observations will probably differ from mine, which keeps things interesting.