Vimeo direct links are re-downloading constantly and refusing to load

I’m working on a website with many videos for my client’s projects, all from the direct links on Vimeo from his Pro Account. The videos are not working on my website, sometimes they load but keep re-downloading in the network tab with every scroll, and sometimes they refuse to load. I’ve seen many websites using the same approach of embedding Vimeo videos as mine. But none of them have the problem I’m having.

The video URLs are like this:

External scripts I’m using are:
Lenis Smooth Scroll
Overlay Scrollbars

Sorry, I can’t upload a read-only link due to the client’s privacy.