You're forgetting the most important selling point of lectures: Anyone can give them with little to no preparation if they know the material. Lectures are basi

You're forgetting the most important selling point of lectures: Anyone can give them with little to no preparation if they know the material. Lectures are basically the "default" teaching method, you take something you already know and explain it piece by piece. putting knowledge down in any form of media is almost inherently harder and more expensive than just explaining it in person or on camera. Back in university, every time I had to find an explanation for something online on YouTube, recorded lectures were usually the worst choice, if I had a choice, because there was often no produced video explaining something, but there were always lectures recorded from somewhere. Because lectures are easy. I did actually find one place where lectures were better than directly reading the material, and it was mathematics lectures, just because amount of symbols and obscure language that often goes into putting something mathematical down in text over just explaining it can be ridiculous to someone like me who has never managed to learn the latin and greek alphabets however many times I tried.