(Wall Street Journal article via archive.is)
YouTube has passed Apple Podcasts and Spotify for podcast consumption.
Personally, I only listen to podcasts when I'm walking (using Fountain, of course), and I cannot imagine consuming them at my computer (there are almost always better things to watch). I'm also old enough to to think podcast=audio; I've been listening since before Apple made them a part of iTunes.
I do, every once in a while, hear a reference to something visual on a podcast (like a cat or dog stopping by), and may look for that online later, but watching them just isn't my jam.