On that particular clip, the basic "tone" of the congas sounds quite prominent to me, almost too much, to the point where it becomes mono-tonic, omnipresent, and the ear just blocks it out after a while because it's almost annoying. What is missing from the sound is the SLAP, the flesh of the hand. That could be the player's technique, but more likely just not enough 1.5k from the board.
And someone tell those guys to stop rushing! geez. Guess that's what happens when you've played it waaaaayyyyy too many times.