Not to pick it a part, two observations which may not be accurate..
1. Upper body movement, head seems to move vertical from the top to the down stroke. Not necessarily a problem, just an observation.
2. The left wrist at the top looks a bit arched, but again this may be just the angle or your grip that creates this appearance when in fact it maybe flat. Also a flat left wrist at the top is not necessarily a requirement or a good thing depending upon the component variations.
It does appear that your are swing, but I had the feeling you were trying to hit, this may be just an appearance and in reality you are hitting.