Need a video background

I'm using this theme https://colorlib.com/sparkling/, and I would like to create a video background see the screenshot :disappointed:prntscr.com/m6bwe4" target="_blank">https://prnt.sc/m6bwe4http:disappointed:prntscr.com/m6bwe4.

Theme provider topic https://colorlib.com/wp/forums/topic/backgroud-video/ suggested this plugin https://wordpress.org/plugins/video-background/

Can you help me to get this done?