Except that students don't watch the videos. We have so much log data on this - most of them don't bother to actually watch the videos. They intend to, they think they will, but they don't.
As a university student currently taking a graduate course with a "flipped classroom" curriculum, I can confirm that many students in the class aren't watching the posted videos.
I myself am one of them, but I attribute that to the fact that this is a graduate version of an undergrad class I took two years ago (but have to take the grad version for degree requirements). Instead, I've been skimming the posted exercises and assessing myself which specific topics I need to brush up on.
If they can perform well without reviewing the material, that's a problem with either the performance measure or the material.
And not watching lectures is not the same as not reviewing the material. I generally prefer textbooks and working through proofs or practice problems by hand. If I listen to someone describe something technical I zone out too quickly. The only exception seems to be if I'm able to work ahead enough that the lecture feels like review. Then I'm able to engage.
