She also fights him at one stage. But if you look at the vid at 1:59 it's Matt without his helmet fighting Danny (you can see the clothes are the same, even though it's a stunt double), and then right after that you see Jessica step in, with Iron Fist on one knee in the background, in that same location, and still wearing the same clothes.
Also, looks like Luke Cage is a bit less restrained than he was in his own show. He's smashing people through walls, plowing them through concrete pillars etc.