Comment by p-a_58213

It really depends on the subject matter and the institution's focus (and tier). For disciplines where foundational knowledge remains relatively unchanged (say, Latin) recorded lectures could be an efficient way to disseminate information without requiring professors to repeat the same material. A "flipped classroom" would offer opportunities for more dynamic interaction and deeper understanding, and of course this would cost money.

However, as a professor myself in a rapidly evolving STEM field adjacent to AI, I update at least 20% of my course materials each year to keep pace with new developments. As it happens, about a third of the new content is derived from my research group's latest work. Recording lectures isn't a one-time effort; it would require constant updates to remain relevant (and let me tell you, if you want to get the voice-over right, it is a lot more time-consuming and soul-crushing than simply turning up in class and giving a live lecture).

The value of live lectures goes beyond just "transmitting" content. They offer real-time interaction, immediate feedback, and dynamic discussions that adapt to the students' understanding. This level of interaction devilishly difficult to replicate in recorded formats.

I would ramble on more, but I need to return to the lecture materials I am developing for this Friday on Vision-Language Models :P