your sushi got alot of air inside, try packing the rice a bit more... did you add mirin to the rice? i was unable to see clearly whether you are using the normal grain rice or the japanese short grained rice. Try compacting the rice a bit more, adding some vinegar will loosen the starch content when compacting the sushi, leaving enough room for smooth texture. If you are using normal grain rice (local) do add a bit more water to the rice to make it softer and stickier.