I have never met a video that wouldn’t benefit from some editing. The whole purpose of video is to compress time and distill a message to its essence. It is important that you refine a project by continuing to strip away its unneeded parts. Never have I heard an audience complain that a video was too short. There is a reason to edit and it becomes increasingly clear when you actually watch people as they watch your project. Do your best to strip a project down to its essence and only add what is needed.