I know you can do animations within Photoshop and at the 1080×1920 aspect ratio, sounds like you are making a YouTube shorts out of those images, right? I have made YouTube shorts in Sony Vegas pro and it does cut out parts of the video clips if they were originally 1920×1080, but I do not think they lower the quality by much since its still similiar aspect ration and quality but reversed. Let me know if you need more input from me on this! 🙂