Note that 3B1B often warns you that his videos bring perspective for a book/class that you're doing or are already done with. And Khan Academy's focus is for K-12.
If you want anything past Analysis 1 I think you'll find that universities guard their content.
> If you want anything past Analysis 1 I think you'll find that universities guard their content.
Not so; there's an absolutely vast amount of freely available undergraduate mathematics resources available at all levels. Honestly, so much that it makes it confusing to choose and not get distracted by the options -- perhaps AI-mediated distillation could be helpful in the future.
Really? Can you link some for Analysis and beyond?
I wanted to find good analysis video lectures from a real university complete with problem sets, homeworks and their solutions. I couldn’t. I think MIT OCW now has one analysis course like that, but it’s relatively “recent”.
> I think you'll find that universities guard their content.
Hmm. All the way back to when I was in college there was advanced content available from the Open University. You had to be awake at 2am and it was in black and white, but it was there.
If you want anything past Analysis 1 I think you'll find that universities guard their content.