There are so many reasons a “car podcast” is a horrible idea. Safety is at the top. You have the seatbelt issue sure, but then the bigger issue: distraction. They will not be focused on driving which should be the top priority there. It’ll be on constantly making sure camera/audio are good (even subconsciously), having conversation flowing (so not focusing on environment), and then of course the idiotic laughing they do (so let’s close our eyes while driving!). Then you have how wasteful it is - driving around to record. Why do you need to be in a car? It’s not like with teenagers who do this tit because they have no free space, these are adults with plenty of places to have a private conversation, the ability to pay to go to a set location if need be, it’s all just so stupid.