Android: It's no secret that Android file management is meant to stay in the background. When you do need to move files around manually, we have our favourite apps. Redirect File Organiser helps minimise how often you need to do so.
The app could hardly be simplified much further. You can set up simple redirects that move all of your video files into a particular folder, for example. You can also instruct the app to move files from one folder to another or create complex custom redirects.