Question regarding video backgrounds

Hi,

Now I am aware that the parallax video row background is a thing and how it works. However, I used the landing page as a template and I want to keep the top as it is, but of course, change the video that is playing.

Since the used ‘bits’ don’t appear anywhere I went to the classic mode editor where I found the video in question. However, upon changing it either does nothing, or it won’t change the link at all. For example, I can completely remove the link in place and replace it with a different YT video and the page pretty much ends up broken.

When I just simply edit the link it goes to some random city background fading on. Either way, I cannot seem to get the desired background at this time.

Landing page