Yes, sadly that's the issue with mobile platforms, I had a browse through the Android games I got with a Humble Bundle 10 years ago hoping to play Ridiculous Fishing but none of these games work anymore.
I use LibreTube[0] on my phone which is a client for Piped so you can probably make your TV App a client as well so you don't have to do the scraping yourself.
As the Dokku maintainer said in another comment it is possible to deploy directly from an image instead of from a repo.
For one of my project I build and store the image on GitHub and deploy it on Dokku.