Amazon Prime Video has a documentary available (free for Prime members) on Chesley Bonestell, made last year. I liked it - I didn't realize that he was a successful architect prior to making a name in "space art".
HBO Max is now showing the 5 seasons of "Babylon 5". It looks great. Except for the pilot, it's been
meaning that started with the negatives, and cleaned up the film and CGI. Although originally filmed widescreen, they couldn't remaster in widescreen without redoing all of the CGI and composite work, which was done in 4:3.
While I've been enjoying "The Expanse" (starting S2), the acting, plot, and writing of B5 is unequaled for me.