Elementor Background video is slowing down my website

My homepage is loading very slow. It looks like it has something to do with my background video hosted externally on Google servers (YouTube). I’ve run a couple test on GTmetrix and they mentioned I should leverage browser caching for the following scripts : https://snag.gy/Zdb45x.jpg

I went on the live chat to try to figure this out but nobody seems to understand too…

I didn’t build the website from scratch. It’s a new client that had its website built on Elementor and I’m not very familiar with it. Is it normal for Elementor’s background video to slow down the website that much?

Thanks for your assistance. Support is granted so you can have a look at the backend maybe.

Website : https://santek5s.com/