For instance, a user could activate recording for the game or any individual session. Maybe after not crashing into other cars or getting a clean run of cutting up through traffic it can record a replay? I know there's the whole capture the whole session but sometimes it'll be cool to capture a 2-minute run or a cool little chain of just swimming.

Recording could either be a continuous loop of a certain duration, or manual recording of particular intervals. For example, it could be recording a session and once the user hits a certain marker or event in the game, it automatically creates a recording that could be shared with others.