Best way to record a preview video when submitting a lens

Hello, when I record a preview video using the Snapchat camera on my phone and try to add it in lens studio I get an error saying the minimum resolution should be 720 x 1280, but the saved video from Snapchat always has a lower resolution. Is there another way to record AR Lenses? Using a 9:16 aspect ratio also does not work. I tried to check the preview submission docs but could not find anything to help. https://docs.snap.com/lens-studio/references/guides/publishing/configuring/creating-a-preview-video/