These are channels I follow or at least like enough to look up once in a while. They're a bit random. I apologize if any are repeats, but they're worth repeating (and I didn't read every reply):
Adam Savage's tested: https://youtube.com/@tested
bigclivedotcom: https://youtube.com/@bigclivedotcom
Intelligence Squared: https://youtube.com/@intelligence-squared
MIT Open CourseWare: https://youtube.com/@mitocw
Townsends: https://youtube.com/@townsends
Entertainment:
Cirque du Soleil: https://youtube.com/@cirquedusoleil
Very other:
SBSK: https://youtube.com/@specialbooksbyspecialkids
the channel features a man who goes around and interacts with/interviews disabled children and adults. I take this one in small doses. It is not long form in the traditional sense of a well researched and thoroughly laid out topic, but I find it very wholesome/heartbreaking at the same time.