I have had a search around the forums but could not find a solution to this.
Wix support info suggests that videos will not auto play on mobile (or tablet) because of data usage reasons however then suggest looking at Apple and Google developer tools.
Apple does include some reference to cading changes that could perhaps enable the videos in the slider to autoplay, but as my coding skills are very limited I am not sure how to, or even if it is possible to enable this on a Wix site. I have included the Apple description below.
Has anyone been able to turn on Autoplay for videos being used as backgrounds in sliders?
Information provided by wix is as follows:
Autoplay on Mobile and Tablet Devices
You may find that your music and videos do not play automatically on iPhones, Androids and tablets.This is because Apple and Chrome block the autoplay function to prevent additional data charges from the visitor’s cellphone network. No data is loaded until the user taps the play button on the audio or video player.For more information, please seeApple’s Safari Developer LibraryandGoogle’s Developers guidelines *. * Info from Apple Developer site: