I agree his videos are getting better. I feel that he has finally grasped the important concepts of CCTV - sensor size, pixel count, focal length, DORI, etc. He could definitely do a better job in talking about these elements in his videos, especially when he compares cameras (for example I've never seen sensor size discussed in a comparison video which is shameful), but I believe he understands them now. Honestly I don't think he had a good grasp of these concepts when he produced his earlier videos.
I am surprised however that he doesn't take a quick second during his video to say something to the effect of, "Pixel size is an important factor that plays a role in how well a camera will perform at night. If you aren't satisfied with the performance of these 4k cameras in low light, be sure to check out my other video where I run through some lower resolution cameras which depending on their sensor size can perform better in low light situations." It would let people know that they don't have to settle for terrible low light performance AND drive people to his other videos which seems like a "no brainer" to me. Of course that would open up the fact that he never talks about sensor size when comparing cameras and their performance, so maybe that is the reason.