[surajrmal]

Many people don't absorb information the same way. A visual demonstration tends to help me understand things in a quarter the time reading about it might. I know I'm not alone in this regard. You can always increase video speed to increase information density. Being able to accommodate folks with different learning styles is part of being in a team.

[tqi]

I 100% agree that a visual demonstration is very valuable, however my objection is less about information density and more about structure and clarity. In my experience these videos are rarely carefully planned and structured keynotes, but rather improvised, meandering, stream of consciousness brain dumps.