How to add a border to a cutout?

Put a video at the back, click on your border and drag it to the next level. The principle is the order of layers. If your border is not in png format, it is useless. Make sure that the middle of your border is empty, so as to establish the up-down relationship I said and the video will appear in the border. If a border is provided, select the black part with ps, click Delete to export png, save it in your mobile phone, and then import and cut it. Just do as I said above.