There was a lot of weirdness here, such as storing the playing users,
clearing the playing users from test scenes (!!), and storing the users
being wathed.
This was all a thing because the previous implementation overrode the
base method implementations, which is no longer a thing.
Due to a callback set up in another place, clicking away from the 2022
year after launching the test scene would remove the 2022 button
(because the callback was returning metadata without it). For simplicity
just trim the 2022 year to make sure both test scenes use the same
consistent set of years.