I forget when his content turned into... This, but it's the reason I've unsubscribed. I'm guessing he realised he gets more views and so more money this way.
It might have been after the "erm actually" response he made to the speed of electricity video.
Yeah, when we tried to do the "gotcha" thing with electroboom where he was completely wrong on the main topic of his original video but "right" on a technicality because he framed it as a trick question. But conveniently didn't mention the "trick" in his original video. Jackass.