Mid-90's in the United States...
Somehow I bought a Hauppauge TV tuner card, it may have been this one:
https://www.ebay.com/itm/325897614012
"Receive data broadcasts with Intercast and Wavetop"
Now, I don't remember anything I specifically downloaded using this. I'm not sure if it was still being used at the time, or if it was even supported in my area. I picked the tuner card up at a surplus store and it was at least a year or two old at that time.
I remember you needed to use a certain application and images or websites or something would appear in a browser while you were watching a TV show.
Edit: Intel Intercast, apparently
https://en.wikipedia.org/wiki/Intercast#:~:text=Intercast%20...