Background Video(s) do not act like they are uploaded

hi everyone. i have used many background video elements on many sites, but my current project is erroring hard. as shown in screenshot, the file is not registering like it doesn’t exist. there must be an issue with my project on Webflow’s backend.

the videos sometimes play on my published site, most of the time they do not.

the 2nd screenshot is a successful video

Here is my site Read-Only: LINK