Problems: Casual education.
On normal everyday televisions should be recorded lectures on random topics
Simple show lectures on television. Assume no background, people will be able to pick stuff up.
So, yes, this makes a lot of sense, and yes, I also thought of this, actually, before 2005, when I came to Japan and saw that there, TV of national television was casually broadcasting school math lectures for middle school. It's a pity that most Western broadcasters focus on news, movies and advertisement, rather than educational use.
I wonder how television works in times when many people use Netflix and Youtube? Who in TV decides what programmes are produced and streamed? Who funds them? Any way to influence TV makers in their choices? Are they using any innovation tools to discover new ideas what to stream?