OBS Plugin
OBS Plugin is a set of plugins for OBS Studio, written for one streamer's own setup and not distributed. They run inside OBS on that streamer's Windows computer.
Signed in with Google, the plugins that follow a game (Counter-Strike 2, Overwatch, Battlefield 1 and PUBG) use the YouTube Data API on the streamer's own channel. They find the broadcast that is live and add a timestamped line to its description for each match, so the recording gets chapters. For some games they also keep the broadcast's title on the current match, and when the stream ends give the recording a title and thumbnail from its best match.