@info21691 if you’re referring to background images specifically, that’s still a feature request 
https://support.wix.com/en/article/request-playing-video-backgrounds-on-your-mobile-site
You can try using a strip as a background as a workaround.
@info21691 if you’re referring to background images specifically, that’s still a feature request
https://support.wix.com/en/article/request-playing-video-backgrounds-on-your-mobile-site
You can try using a strip as a background as a workaround.