Entries may carry a hold verb beside verb; the ring fills while it charges so
the commitment is visible while it is still cancellable, and sliding off
cancels. Holding the camera starts a recording, tapping or holding it again
stops it — the same seat, because the dial is muscle memory.
No wf-recorder or wl-screenrec on the device, so it is grim piped into
ffmpeg. Half scale: at 1080x2160 grim manages about 3.5 fps and a recording
that captures a third of its claimed frames plays back at triple speed.
Its own process group, and SIGINT to the group: only ffmpeg can finish the
file, so killing the shell alone would orphan a screen capture with no way to
stop it.
Reachable as a verb too, not only by thumb.