It seems that the very long videos are a reaction against the very short clips. Usually the topics and density of information are not enough to consistently fil

It seems that the very long videos are a reaction against the very short clips. Usually the topics and density of information are not enough to consistently fill that amount of time, whereas it would be perfect in 10-30 mins. 60 secs: too short to convey much, 60 mins too long to convey too little.