>>12205256There are plenty of full lectures on youtube which are great content. See Friedrich Schuller or Tobias Osborne for instance. Obviously, you'll need to find problem sets and solve them yourself to properly learn the material. But it's solid content.
Also, tons of conference talks are now being recorded and posted online due to covid. It's fucking amazing how many talks I can just watch on my own time, which in the past would have been relegated to some 30 minute session in a hotel halfway across the world. I guess this isn't so relevant to students but this is where you learn real, cutting edge science.