It is useful for evidence or just to show off :)

So people can learn about their mistakes without having to think about recording or recording the whole session

boss kills, player deaths, and other players deaths. Maybe white bags asw

this will be good for some streamers to have that don't focus on raids or pvp in WoW. Even nonstreamers would love to see their most awesome PvE successes available for replay. Not everyone will remember to use their hot keys to capture it manuall...

Whenever the announcer tells the crew a new wave is coming obviously means some combat will take place, the events are easy to track as they play the same 4 or so audios and have a little window pop on the screen, you could take this as a queue us...

kill of the monsters in dauntless and starts and ends of hunts or missions

Its useful because a lot of people wanna do arsenal and never miss out on one of a unexpected trick and they did not record it or they forgot to record it.

Add an auto event for when you defeat a boss (like Gronk or Bob). This would let people see that epic battle where everyone dies except you.

Add events like a headshot, kill, death, getting revived, reviving someone , squad wipe, tank or grenade kill, kill streak etc... and also add highlight