Im thinking about in all the ways even streaming now. Im thinking before streaming the stooges would be a good contender. Was shown in movied theaters and had reruns going all the time on so many different channels. Its a wonder life used to be spammed in november and december before the ip was taken back out of public domain.
EDITING. Im thinking more about the same thing being rebroadcast I think which is why I was thinking its a wonderful life to. So like there are only so many stooges and they get replayed a lot as opposed to like the simpsons or doctor who running for a whole bunch of seasons.
I’d say something like Seinfeld or Friends is probably it, there’s still channels showing reruns of these all day long across the world.
You’ve got to consider stuff that was popular and universal enough to get translated to many different languages and then still get rerun in those countries too