yea. you're unbalanced.
It looks like you move to the right and almost lock your right leg so it's not loaded properly and your not set or balanced. If you didn't swing it looks like you would fall over. Your right leg is locked so your weight is going from left to right like you are tipping over.
You are getting there 'just in time'. Try to get to the hitting area ahead of the ball to give yourself time to set up loaded and balanced. Those balls were hit right to you so you have the time to get there first and be waiting. You just have to adjust your mental process.
Yonex VCore 100s - SW 351 6pts HL
Tour Bite / Luxilon 4G 16 @ 51lbs