This WordPress plugin can be used as Full Screen Multimedia Background, Full Screen Multimedia Gallery and Full Width Multimedia Slider with both Images and Videos.
Demo https://codecanyon.net/item/imagevideo-fullscreen-background-wordpress-plugin/5899703
Downloadhttps://www.filecad.com/ikuH/Image-&-Video-FullScreen-Background-Plugin-v1.6.rar