Hard to tell your NTRP since you're just hitting rather casually. Based off of what I see I would say between a 3.5 and a 4. I am just not sure because you're not in a competitive situation and there are a few things that I see in your strokes that could cause that to fall either way.
You have a decent forehand, but there are a few things that I do not like.
You are very armsy. It seems you're trying so hard to achieve a windshield wiper form that you forget to use the rest of your body. On quite a few shots it seems like you try to gain power my just flipping the head over with your hands and without shoulder or lower body movement.
There are also a few times in your video where you seem to be trying to guide the ball instead of stroking through it. This causes your to lose acceleration into the ball causing a weak hit.
Overall, not bad. But an accurate assessment of your rating is difficult without seeing some competitive points