[remus]

Personally I don't think it is so clear cut. The value of in-person instruction is in being able to ask questions, and a good instructor will then adapt the content to help answer your questions and give you a rounded understanding of the material. Youtube videos are amazing in several respects (thinking of the reach and production value of 3b1b, for example), but being able to ask questions of a knowledgeable expert is valuable imo.

[beambot]

From my experience at a R1 school, this is only true for late-undergrad and grad classes, not early-stage coursework with massive student-to-teacher ratios. In those courses, you are more likely to get Q&A time with a TA during office hours. So perhaps a YouTube+TA would be better model. Bonus is that you can rewatch lectures again & again until things click.