The Marshal was indeed one of the greatest knight who ever lived. The jousts he participated in were not the highly stylized civil affair it became after his passing. Could you imagine participating on a team of mounted knights as part of a much larger melee battle?
I take issue with this video on some of its claims, like "testing his armor" - when the Marshal, or any of his contemporaries, never wore any plate armor at all, so why's he having a go at a full plate harness with a lance? That was funny to me.