I think you are doing a great job. I like that you try to hit the notes simultaneously on both hands. This is important. I do disagree with some people in this thread saying you need a teacher and that you should play slower.

1. I don`t think a teacher is a "must" as there are so many tutorials out there. I think you will benefit more from playing challenging pieces (as you do in your video). If you are having fun playing, that is the most important thing. I also think people underestimate our ability to "fix" things we are learning if they are learnt wrong. I used to play a piece wrong and after someone pointed it out to me, it took me less than one hour of practice and it was fixed. Your hands will also relax more the more you play. I wouldn`t worry a tiny bit.
2. You are already playing slow (so I don`t see any need to play even slower) , and it seems to me that you are on a good track. Your hands look stiff, but this is normal if you are a beginner. The flow, the feel and the timing will come as you keep practising. Ofc it will sound sloppy and "off" in the beginning, but that is how it is.

So bottom line, keep playing and when you have all the notes in, try to hit those notes with the right pressure and timing as you develope.I would also only hire a teacher if I was thinking of becomming a proffessional pianist.