Maybe I did not hit all the points I wanted to make.

Go listen to real NPR, sometimes they say "go see the video on our website" that is what we are going to do.

There will be no downloading video in the RSS feed, so no need to split files, worry about encoding, bandwidth, storage issues,   Vimeo can take care of all that.

Archive.org can have all of the videos, if people want to actually download the episodes.