У вашего броузера проблема в совместимости с HTML5
A video made over 10 years ago showcasing over-bounces and trick jumping in Quake 3 using VQ3 (Vanilla Quake 3) gameplay.
EDIT: Lol, this video is blocked in 246 countries but still available in South Sudan. I guess I'll leave it here in case those greedy music corporations change their policy...