Pretty sure there’s a pinball streamer that does a community competitive movie riffing thing once a week where everybody riffs and votes on the jokes later.
Also rifftrax has a twitch channel but I am pretty sure it isn’t ever live riffing
Penn Jillette used to have a weekday group at one of the Times Square movie theaters to heckle a movie that came out that week. There may have been drinking involved.
I'm thinking a rotating cast of us and our friends on a giant video conference call just busting out the reactions.
The problem is gonna be resisting the urge to pause the race to fit in all the hilarity/hot takes/asides/stories/etc