I've never thought of looking at YouTube's front page for suggestions. I think I saw it once, yup, very Idiocracy! I never have subscribed to anything. Some fav channels are MonoNeon[0], Knower[1] and Scary Pockets[2] (music), Chess24 (chess) and the fairly defunct Vi Hart channel (maths/art/?).

It's frequently been asked on here before what peoples' fav channels are. One search:

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

I think the best channels I learnt about from HN were the magnificent Every Frame A Painting[3] and Captain Disillusion[4], god bless 'em.

[0] https://www.youtube.com/user/TheMonoNeon/videos

[1] https://www.youtube.com/user/LOUISGENEVIEVE/videos

[2] https://www.youtube.com/c/ScaryPockets/videos

[3] https://www.youtube.com/c/everyframeapainting/videos

[4] https://www.youtube.com/c/CaptainDisillusion/videos