I studied applied mathematics and I often point those (few) people who ask me questions about abstract issues towards their articles (e.g. about symmetry and gr

I studied applied mathematics and I often point those (few) people who ask me questions about abstract issues towards their articles (e.g. about symmetry and group theory). They're excellent in that regard. Regarding other subjects, I'm no expert, but I appreciate their style (and I have to say their infographics are very pleasing on the eye). I never watch videos or multimedia content so I can't vouch for the videos either (which others in this thread have expressed appreciation for).