There are so many relatively popular youtube channels making 10 to 20 minute videos about interesting subjects which say nothing more than the Wikipedia page for that topic. Whole channels, well liked by the algorithm, built off paraphrasing Wikipedia without citing it.
Being generous to them, some of them do a good job of picking topics I wouldn't have thought to look up myself. They probably do spend a lot of time reading through diverse subjects looking for the interesting ones.
It’s probably low effort scripts that are performed by influencers. The scripts are probably not written by the influencers because the influencer usually brings the looks, voice acting, and charm.
Some of them certainly, that beard and thick rimmed glasses guy with a dozen channels comes to mind (I don't know his name, but other people have given me the same description of him). Others are pretty weird looking nerdy guys tbh, I believe they probably read Wikipedia a lot.
Being generous to them, some of them do a good job of picking topics I wouldn't have thought to look up myself. They probably do spend a lot of time reading through diverse subjects looking for the interesting ones.