@steelman Podcasting most definitely predates Apple. They added support for the technology, but they most certainly did not invent it. Obviously the iPod as a product played a role as inspiration, but that's where the connection ends. https://internationalpodcastday.com/podcasting-history/
@jaredwhite Thank you. I didn't own any MP3 player back then and wasn't aware of the early developments.
BTW. Isn't there in English any better term than “audio show”? We've got at least two in Polish. I mean, shouldn't a “show” be something you can see?