Sports are not regarded as intellectually fulfilling but these channels would change your perspective on how much Technique and Game Planning is involved at the highest level:
As whitebelt who recently started Brazilian jiu-jitsu, I was aware of how strategic it would be but I wasn't fully prepared for how dumb I would actually feel. At the start everyone always seemed two steps ahead of me. So far the journey and the growth I've seen have been incredibly intellectually simulating.
The Modern Martial Artist: https://www.youtube.com/c/TheModernMartialArtist
Adam Ondra (Olympian Climber): https://www.youtube.com/c/AdamOndra
Wylie’s Art and Science of Boxing: https://www.youtube.com/c/LeeWylie1
Also, I see no one mentioning Real Engineering: https://www.youtube.com/c/RealEngineering
Would also like to highlight Terra Mater (animal extinction & habitat): https://www.youtube.com/c/TerraMaterOfficial