How to quickly resize a video on iPhone?

how to quickly resize video on iPhone so here is this app called precise video and yeah you can just upload any video from your photo from your gallery um and then yeah just tap plus upload any video you want to do and then change or how you want to resize for YouTube for Instagram and then just change aspect ratio and then you can just save it or you that's what you can do and the app is called cleardale so it's also available on the web