so, will screenshots work for runs? like, if I screenshot my time, if not my runs will either be phone recordings, or twitch recording that are so laggy you cant tell what I am doing.

I don't think screenshots are allowed because they can easily be photoshopped

That and we wouldn't know if you started from a checkpoint or not. The xbox one and Ps4 both have video save features that don't require you to stream. Phone recordings will be fine though the previous all missions record was recorded with just a camera.