Unfortunately, at the moment we don’t have video tutorial for this thing. But you can visit our documentation right here about creating multilayer parallax http://support.jegtheme.com/documentation/create-multilayer-parallax/
Also, did you’ve try to use our dummy content? You can use Import Dummy Content option, so you will get most of our demo page and you can replicate one of them on your site.
Let me know if you have any problem in there.