In both formats, an artist must learn the theory, how to use the tools, how to apply the colors, etc., so if an artist learns better in a physical classroom, that is where they should go. If they learn better in relative privacy of their studio and use videos, etc, to learn from, then that is what they should do.
Most likely, the best scenario would be to tailor the education with some of everything available.
Skill is nothing more than talent practiced relentlessly.