Help menu appearance

Hi people

I need help with my site menu, how can i make the menu appear above the video and not below?

At home of the site I got the menu to stay on top of all the content

Here is my public share link: https://preview.webflow.com/preview/marina-vieiras-stupendous-project?utm_medium=preview_link&utm_source=dashboard&utm_content=marina-vieiras-stupendous-project&preview=a7c48cd1a0f9578caf69a4f4f98f19da&mode=preview

I guessing you want the menu to cover (above) the video. I changed the Z to 100 (could be any) and now it covers the vimeo.

ooooow, thanks
where i find the “z”?

image