Broadcast + iPod => PodCast + time => Pod?

I'm curious about transformations like what happend with the word podcast. It started off as a portmanteau of broadcast and ipod and over time the "***cast***" got dropped. IMO the ***cast*** is the important part, since they're all streaming now and many even go well beyond the audio-only limitations of the original iPods. I hear people referring to straight-up YouTube videos as podcasts now, or just "pods". Was it the podcast "Pod Save America" that first chopped off the Cast part and normalized this usage?