This snippet by Dudley Storey will help you add a fullscreen video to your website’s hero section with a nice title overlay using mix-blend-mode. This can work well on e-commerce sites.
If you are having trouble with the pen, try the archived copy on GitHub
See the Pen Fullscreen Background Video with Mix-Blend-Mode Overlay Text by Dudley Storey (@dudleystorey) on CodePen.0