PSV Eindhoven is a club from the Netherlands playing in the Eredivisie, the highest division in the country. This video was uploaded yesterday and appears to be from a friendly between PSV and FC Eindhoven the same day.
PSV won 3-0, much to the delight of the fans and this young general here, who confidently leads the stadium in the "come on you boys in red" chant from atop his father's (?) shoulders.
Here's another video with the same chant with bonus jumping cameraman.
[reddit]