I think the issue is just cost -- high-end TV is $250k-3mm/hr . Low-quality TV costs something like $30k/hr of finished product. High-end web is $1-4k/hr. Amateur is $100-400.
You can produce much more niche content if you need only $1k/hr to produce it. Niche reduces the cost per hour for the same quality, too -- I'd rather see dmor or sama or garry talking about startups for 15 minutes vs. Morgan Freeman. Non-talent costs really can be dramatically reduced in a non-union world, especially one where the principals are compensated through equity or other non-cash, for the same final quality. And, if something is niche, I'll watch it even if the editing, sound, video, etc. aren't quite up to the same level.
There was a lot of news and special interest but throwing Educational programming into the mix is not factually correct.
I have two list, one from 2011 and one recent. Both show an emphasis on Entertainment and Extracurricular programming.
Recent: http://www.youtube.com/yt/advertise/original-channels.html
From 2011: http://www.tubefilter.com/2011/10/28/youtube-original-channe...
Not too many pure educational programming plays. Certainly not the majority.
->Non-talent costs really can be dramatically reduced in a non-union world...
Producing content is like anything else you have to make, a lot of times you get what you pay. I've worked with a lot of new workers, the good ones rise to professional level pretty fast and they won't work for equity/portfolio for too long. I think Youtube has gone as far as it can go with cheap content, which is pretty good. Now they are experimenting.
I would consider a lot of the science/food/tech/automotive stuff as "educational entertainment" to the extent that the Hitler Channel and other cable tv programming is educational. But there is not a single thing there I'd personally watch.
(The only YouTube content I love, personally, is Hickok45, MrColionNoir, etc., and cat videos. I'd love curated high quality cat videos. I'll probably get some cats and a 4K RED or Canon just to have an excuse to produce this.)