When the both go at Jackie at the same time, it's incredible. It is indeed an incredible fight, even more considering Jackie was far from his prime here. It's insane.
You want a fun fact about this fight? The kicking guy, Ron Smoorenburg, is truly impressive, but he couldn't adapt to Jackie's "rythm"; so, for an important part of their fight (like the exchange starting at 2:37 in the vid), he was doubled by Brad Allan.
Who's Brad Allan, you may ask? Well, he's non other than
THIS guy. He's from Jackie Chan's Stunt Team, and he is so adjusted to Jackie's rythm, that he even stunt doubled martial arts LEGEND (and one of my favorite martial arts actors EVER), Donnie Yen, for some of his fight with Jackie Chan in the movie Shanghai Knights.
Edit: Man, I'm starting to sound like an over-enthusiastic wikipedia article.