Edit: having replied to another comment, I think I’ve realised something. IIRC The original YouTube license deal with PRS meant that they only sent over video level data - no cue sheets of music tracks etc. They specifically wanted this in their license. So their current implementation might be a remnant of that.
News and educational content actually have quite narrow scope. And those episodes/segments probably wouldn’t fall under that scope.
And then you have to take into account the overall purpose of the channel. Which is not one of news/education.
People watch it for entertainment much like the old Michael Palin travel documentaries. None of which are considered news or educational.