My Cryptography professor did this during COVID, since the classes were split in person. It was an interesting model. I'm not sure if I loved it or not, but it was at least a change of pace. Getting 100% of the class time to ask questions was really nice, but it ended up with him re-teaching most of the online lecture in class because some quarter to half the class just didn't watch the lectures.
If done more stringently (if you didn't watch the lecture, I'm not reteaching it), it maybe would've had a bigger impact, but I'm not sure.
Office hours remained king for serious Q and A for the class.
One way to fix that issue that I’ve seen is a daily quiz to start the class. The key is the quiz is super easy. Even if you were confused by the lecture, if you watched it at all you’d likely get a 100 on the quiz. If you didn’t watch it you’d likely get a 0. This quickly for people watching the lectures online ahead of class.