Admittedly, there are exceptions, but the general picture is you're overworked, underpaid, and barely hanging on until (and if!) you get tenure. Even after tenu

Admittedly, there are exceptions, but the general picture is you're overworked, underpaid, and barely hanging on until (and if!) you get tenure. Even after tenure, you need to work hard to be promoted to full professor. In many disciplines, books are part of your research output. In others, it's something that you usually do once you are tenured and want to show broader impact for your promotion to full or when you are already promoted to full. Out of curiosity, who are professors on YouTube that you have come across?