(Code embed)Adding a close button inside a div element

Hey guys, looking for help with possible coding solution.

Goal: To embed a close button X positioned to the top right of a fixed background video, to provide an option for users to close the video.

Poor visual example (apolagies in advance):
x_icon

I’m reading up on W3 schools to see if i can find out where I’m going wrong but to no avail.

Background video element (bottom-right) is the focus, not the bottom-right video example.

Is there a way to complete this…that can be passed on? Cheers ~ Steve

Read-only link:
https://preview.webflow.com/preview/fixed-video-test?utm_medium=preview_link&utm_source=designer&utm_content=fixed-video-test&preview=6cb8b016deacdbd31d2b66528e91c65f&mode=preview