Hello,  I'm having an issue with the video background on my mobile device.  I'm previewing it on an iphone OS 15.

When the site first loads the video background and the background image doesn't show up at all.  As soon as I scroll  down it pops up.  This is consistent every time I reload the website on my mobile device.

All the videos have been uploaded correctly with the the correct different formats and the correct ratio.  I've already troubleshooted with the video background articles. 

Any help you can provide would be very helpful.

Thank you in advance.