Stremio works on android TV. I use the Stremio + RD + Torrentio setup, it's great for essentially mimicking the Netflix experience in that you can sit down and browse movies/series, watch trailers then just select something to watch right then and there. It's intuitive so my family can use it easily.
If you mainly watch movies on your PC/laptop then there may not be that much material gain from the above setup - but it is a good option if wanting to fully replace the Netflix-esque experience.
Yeah, I was being a bit flippant but it's true that FOSS is more compatible with open science. To be honest nothing I use anymore is paid. My testing software, analysis software and modelling software is all FOSS and developed by Academics in my area and I honestly don't see an advantage to paid versions. Shit, we even use Inkscape to edit figures.
Generally there are free trials or FOSS alternatives for most academic programs because academics are stingey af.
Cursory search showed Spin Works might suit your needs.
Any reason for playdate vs a Miyoo or Anbernic system?
That's more complicated than Stremio to setup though, and still requires you to download the movie/show before watching, correct? Stremio just requires adding Torrentio in the app and linking your RD account once - then it's easy times.
Listen, I think Jellyfish is great - but it really is a horse's for courses scenario. The Stremio + Torrentio + RD triad just works for a lot of people that need a wife proof solution (pardon the sexism) and don't want to store all this content.
Out of interest, does Jellyfish have ability to list Netflix, HBO catalogues? That's a convenient add-on in Stremio where you can essentially browse a specific streaming service's catalogue, or at least their most popular items.