Hi,
The problem is not on the images template, it’s on the video template and on the mobile / responsive settings. Please, take a look at my website on a mobile phone (iOS preferably) and do a scroll. You would notice that the <body> background image will scroll with the page and when you get to a section where you would see the background, you actually see a white background. I would like to <body> background image to stay put when you scroll on a mobile device.
Thanks,
Celso