With JKreativ Themes we provide 5 kind fullscreen gallery that you can use, you need to create page by using page template with Fullscreen prefix.
To create Fullscreen Gallery Page, just go to Pages→Add New and select template :
Fullscreen Gallery Page Template
Fullscreen Gallery Page Preview
Fullscreen Single Video
We support Fullscreen Single Video for Vimeo or YouTube video, if you need only a page with 1 fullscreen video.
Fullscreen iOS Slider
Fullscreen Kenburn Slider
Fullscreen Service Slider
Fullscreen Video & Image Slider
On this section, you can mix image or video gallery, you can also have option to show thumbnail bellow the fullscreen image on JKreativ Fullscreen Media Option.