"Tell me everything you know about Javascript in 1 minute." Figuring out what not to say is the hard part of that question. Rambling into the camera for an hour is easy.
But we're not talking about people taking 10 minutes to summarize a complex topic. We're talking about people taking 10 minutes to deliver 30 seconds of simple, well-delineated info.
This is something that happens a lot. I'll Google a narrow technical question that can be answered in three lines of text--there's literally nothing more of value to say about it--and all the top hits are 5+ minute videos. That doesn't happen by accident.