Video or Background Video?

I’ve been adding a couple of background videos to my Webflow website. However, these don’t autoplay unless I turn off the setting “Reduce motion” on my MacBook.

I find this peculiar as other websites do show videos automatically, without turning off the “Reduce motion” setting. As an example, when I go to their website automatically plays their video to me (at the very top of the page). Does anyone know what I’m doing wrong?

Also, while on the subject of Clay. I was very impressed with their hover effect that automatically plays a video when you hover over one of their case studies. Does anyone know how you do that in Webflow?