A certain portion of people just prefer learning from video instead of text.

And audio. This also explains the popularity of podcasts, the descendants of a century or so of radio shows.

I thought the explanation for podcasts was people who drive to and from work, and don't care for current radio shows.

More than just your commute. Any downtime where you are doing a mindless chore is prime podcast time.

Personally, I don't care for podcasts much around the house. I listen to them much less now that I don't commute.