Watching that dude is like watching a child doing science and then using AI to explain the result. If he makes someone curious enough to do experiments on their own it's still a win though.
But if you watch a number of his videos it becomes clear that this is clarity that comes from deep knowledge and sophistication. His channel is also in my opinion notable for having a huge variety of demonstrations, rather than the standard set that is done by a lot of people. There are many things that I've seen only him do, out of my set of science and engineering channels. Which is not to say I know for sure that he is for sure the only one who does them, but it's definitely a more-diverse-than-average set of demonstrations done over the years.
It also, on a more brute level, simply predates AI by a number of years and therefore can't be just an AI script, nor do I see any reason to believe he has switched to using AI to write the scripts.