I know this problem quite well, it’s basically video player bug on chrome/edge which happens a lot. Please try this code in embed form instead of using background video player in Webflow. It might solve that still not sure about it.
Besides of that I would highly recommend to optimise your background video which is 22mb currently. That’s quite massive for Web. That video shouldn’t be bigger than 2-3mb
Never realized that this problem might coming from the video! I uploaded the video again (switch with a smaller size video) and the bug was fixed! I can continue using the built-in background video component and it works perfectly now! Save my life!!