I think they're talking about basic Auth, with which you can pass credentials in a URL like this:
Ghoelian
Qbittorrent has a feature to execute a command on torrent complete iirc. You might be able to write a few ffmpeg commands to verify and delete/move/whatever based on that result. Not very user-friendly though ofc and requires some bash knowledge.
Fetching remote code isn't allowed on the play store at least, though I'm not sure how well they're enforcing that.
That's the reason termux isn't updated in the play store anymore iirc, it has its own package manager that downloads and runs code.
Have you tested if hardware acceleration even works at all? On my Fedora install, whenever I try the latest 545 driver, it just doesn't work. glxinfo just returns an error, insufficient resources.
535 still works great for me though.
Only issue I have with 1Password is their Android app. It works great most of the time, except that they didn't implement the Android autofill stuff correctly.
It sees Firefox as a browser and offers autofill suggestions for the websites just fine, but apparently Fennec isn't on their allowed browser list or something. It just sees Fennec as another android app and doesn't offer logins for the website I'm on, just ones that I've linked to the Fennec app.
That is also a form of basic auth, you still pass the credentials like "username:password", optionally base64 encoded but I don't believe that's required.
Edit: actually, after looking into it a bit more, it seems like passing credentials in the url will actually cause the browser to send it as an authorization header instead. So in essence it's doing the same thing.