But what I'd really like to find is the Reading Rainbow episode that COMPLETELY BLEW MY MIND and made me an astronomer: https://www.imdb.com/title/tt0683450/
LeVar Burton talks about how this broadcast will go out to the stars, and directly addresses aliens, talking about all the neat things on our planet, and how we've imagined aliens in movies, and there's a visit to Arecibo.
(I watched it on a VHS in my parent's pack-rat collection a few years ago, but it would be great to find a digital version...)