Can't find why this top border is appearing

Hi all,

I am finishing up on the website and am waiting for the final assets to be received.
Have a GSAP scrolltrigger interaction for a video.
When testing on a separate page all works as intended and fills up the whole screen.
But when testing on mobile and desktop a big white border on top appears. (no padding on element?)

Would love to hear from an expert.

Thanks in advance!

Here is my site Read-Only: [LINK][1]