However in terms of efficiency, I noticed that the raw educational value of some (often 4h+ long) meetings could have been summarized by watching a well produce

However in terms of efficiency, I noticed that the raw educational value of some (often 4h+ long) meetings could have been summarized by watching a well produced 15min video and reading a 10 page PDF, if one were to skip all the chitchat and pointless hollow remarks. Balancing efficiency and normal social contact can be tricky to get right even in a physical office setting, but I'm fairly sure aiming for peak efficiency to the exclusion of all casual conversation is not a good plan. Those friendly chats when everyone is getting to work in the morning or while the coffee is on matter. One of the downsides of remote working, particularly in the current situation with the virus, is the sense of isolation and potentially loneliness it creates if you don't take active steps to stay connected to your colleagues, and video chat allows that in a way no glorified mailing list ever will.