If you see numbers like that you know something is up, ambient light, error readings, or a badly adjusted projector.I'm not insulted. They're not my measurements and you are free to go find the video on YouTube and use the comments section to criticise the person from Kino Zuhause, who tests projectors for a living, by pointing out that a projector that costs twice as much and that he wasn't talking about has better black levels.
What im trying to tell you is that something is off in that test, and you should go get your data elsewhere for that sort of comparison.
You need to be sceptical to the information you dig out online, compare it to your own experience and measurements, its to easy to make a video that is patching SONY owners or potential buyers on the bag, making them think the black level difference between JVC and SONY is insignificant. when all other data points in the other direction.
If it makes you feel better to think its the same, and your then more happy with your projector, then you should believe whatever you want, just hold back trying to preach it to the part of the world who actually know how it really is.