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I dabble in ham radio stuff, you can (and many people do) send data, video, etc. using ham radio equipment. It's a bit more specialized than just sending voice or Morse code, but it's absolutely doable.
Not amateur radio, but back in about the 80s there were even a couple countries that experimented with distributing computer programs over regular FM radio. They'd play some electronic buzzing noises that you'd record to a tape then to run it as a program. I know the BBC did it, and I believe Finland also had a radio station doing it for a bit.
In a world where the internet as we know it never came together, I could definitely imagine those sorts of technologies evolving into something that still looks a hell of a lot like the internet.
Huh, I wonder what kind of throughput you get on a video encoded via ham (audio I guess?)
It's not something I've personally played around with so I can't really comment on the technical details, but AFAIK the main way of transmitting video over ham radio is basically the same as over the air TV. If you wanted to do a deeper dive into that, look up Amateur Television (ATV)
There's also various methods of sending digital data over ham- D-STAR, APRS, etc. I don't know that any of them are particularly well-suited to sending video, but they're things that exist and I'm sure some dedicated ham has figured out a way to do it somewhere.