So Gnome-based DEs have a video-player by default. The main arguments
in favor showtime I see are:
1. It's the main candidate to become the new Gnome default video player.
2. It's has a mobile-friendly UI.
3. It uses HW-decoding and even zero-copy playback by default on many pmOS
devices (by using Gstreamer and unlike e.g. ffmpeg-based players like mpv).
4. Its main dependencies are shared with other apps like snapshot.
The other candidate that would tick the same boxes but 1. is livi.
[ci:skip-build]: already built successfully in CI