GTA v Video Editor inside toribash
well there is a video editor inside gta v which makes vids by recording: shooting , parachuting and some other stuff , it looks easy to make vids with it because it makes auto keyframing i think from places and some slowmotion and other stuff so i suggest to add replay editor like that in game but with cool gui and options to make a replay cooler with auto keyframing and SlowMotion . it will be easy for the vid makers because they are not going to keyframe by their own and it will help them a lot in other things.