These people are not entertainers. Demand they post their work on YouTube makes as much sense as demanding architects use smoke signals to communicate their progress.
They're not entertainers, there should be no demands.
But I'd think talking a little about their interesting work might serve to better convey what they do to those who are aware of it and reach a wider audience. What ESR has tried obviously hasn't worked, would a half hour chat about their work once a year or a twitch session, or whatever else really make no sense under any circumstance?