I like the advanced tutorials, as well as other more detailed videos. However, I also like some of the entertaining ones as well. The fundamental difference is that more people want to be entertained than educated. Such is life.
I noticed that with my channel as well, and that also ties to the popularity of the Mailbag: elements of surprise entice the curiosity of the audience. In a multi-part series restoring a radio (Philips BX462A), the most popular video was when I had a setback and put it in the title.
All this is fascinating, and explains well the formula of successful "reality TV".