It did not work out well I think, especially since people seek more immediate gratification i.e. Twitch dances or whatever rather than fully college-level subject matter provided entirely for free, oh except having to watch ads for the corporate overlords.
I can’t completely agree with it. There are a lot of college-level-only channels. From English youtube I know only The Efficient Engieneer(engieneering), Thought Emporium(molecular biology, close to popsci), Marco Reps(engieneering), Breaking Taps(engieneering, close to popsci). From popsci Veritasium(mix), Practical Engieneering(engieneering), numberphile(math), computerphile(applied math).
From Russian youtube I can only think of popsci mixed with college-level: Ekaterina Shulman(politology, mix), Chemistry - Easy(chemistry, mostly college-level). From popsci: Physics with Pobedinsky(physics), SciOne(multiple hosts), QWERTY(multiple hosts, originally was about astronomy), Alexandr Panchin(biology), Vert Dider(mix, only translated from english), Artur Sharifov(mix).