I also disagree with your conclusions.
I think it is possible to listen to a podcast on youtube, spotify or some other wall garden service.
Unless that podcast is available via RSS, or at least on iTunes, I consider it to be false advertising to market an audio show as a podcast.
Being app independent is a core aspect of podcasts from their outset.
Capitalism loves to co-opt and recuperate nice things though, doesn't it.
@jamescridland @jaredwhite
Also, to add to your article, "video podcasts" have also been referred to as "vodcasts" over the years.