2. An in-job audio chat with other players when they are in the same job.

Depends on the sharing setting of each individual players, their audio can be shared or in private when they are playing as a party. I caught this audio chat while I was playing online alone – sometimes when you go online you might be connected to another player or a group of players with their headset even when you’re not during a job/mission. You may chat with them through the connected audio.

In this case, the audio of gameplay from me and from the party I somehow connected with are recorded separately – since the built in video recording feature in PS4 does not record audio you get from your head phones. I connected the sound recorder to my headphones therefore audio of the party was recorded.