In the Crucible playlist there are kills, multi-kills, deaths, wins, revives, and general replays that would be great to automatically capture for review and sharing. You could even expand this idea to other playlists in Destiny 2! Here are some ideas for the different ritual playlists in the game without constant management:
Crucible Playlist:
Kills
Multi-kills
Deaths
Revives
Wins
Capture Zone
Super Use
Gambit Playlist:
Multi-kills
Invader Defeats
Kills as Invader
Primeval Defeats
Wins
Vanguard Playlist (this one may be hard to implement/may require constant management/not as needed as others):
Multi-kills
Super Use
Wins
Deaths
Revives
Both the Crucible Playlist and Gambit Playlist should be easy-ish to implement and shouldn't require constant management. The Vanguard Playlist would be hard to implement and may require constant management unless you can find a work-around. I would just implement Crucible and Gambit, and if you're low on resources, Crucible would do just fine on it's own for auto-events/highlights. Please consider this as Destiny 2 is a growing game and one of the top games on steam (Top 15 at the moment)!