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It works on ARM and it can run in the background if you want it to.

BTW you can use Waydroid to run Android apps on Linux.

For me it’s YouTube.

If you can unlock the bootloader, it might be possible to install a Halium distro like Droidian on it. I wouldn’t recommend doing so, however, and there will be missing functionality, such as being able to use any video inputs or watch live TV. It will basically be a large smartphone without a touchscreen.

Instead, I recommend disconnecting your TV from the internet and connecting an external device to it as others have recommended. See if there’s a way to autoboot your TV to an HDMI input. You can also get a USB CEC adapter to use your TV’s remote on your external device for something like Kodi, for instance.