Noted. I will edit the README to indicate where the installation and other instructions are.

The installation instructions are covered in the project website (here), and yes, I will update the demo video to show playing a YouTube video from an instance.

You have quite an interesting situation here. You could use a good Bluetooth adapter, pair all your devices to it, and maybe use pulseaudio/pipewire (depending on what your system uses) to manage audio inputs/outputs?

Very interesting. This looks fine on my Firefox Nightly for Android application. I wonder why it renders differently on different versions of Firefox alone.

Ah, I apologize for not documenting the quit key correctly.

The quit keybinding has been an issue (albeit a very silly one), which could be easily corrected, but somehow escapes my attention during the release phase. I will correct the documentation.

Do note that since the keybindings are customisable, you can modify the quit behavior to a keybinding of your choice. See the "Configuration" section of the documentation for more details.