Do you mean something like this?
Grad Border.ptestyle
Ad a 16:9 Image to a 16:9 project and Apply the style. Change the colours of the border to suit
DG
Added the Style Book 2.0 style.
Made a small correction to the style.
Download: https://disk.yandex.ru/d/qb6ZamKCGCAfuA
Download: https://disk.yandex.ru/d/VA9r8r2h2LWWMA