Background video does not work on the mobile version

Design help General
1

Hello, I really need help!

In this project (2 section) background video does not work on the mobile version, whats wrong?

https://preview.webflow.com/preview/mentium-io-851497?utm_medium=preview_link&utm_source=designer&utm_content=mentium-io-851497&preview=81aa234a7334ba5f686cfa9d37d3721a&workflow=preview

Here is my site Read-Only: LINK
(how to share your site Read-Only link)