The first thing I wanted from Plex on a watch was to exist. The second thing was not a tiny version of the larger Plex app; it was a way to stop music already playing elsewhere before the situation became concerning. Finding a phone, unlocking it, opening the right app and navigating to the right player is technically possible. It also takes a while when the wrong thing (or something) is coming out of a speaker or someone nearby’s noise cancelling headphones.