I cant stop the video and capture a frame...but here's what I see......
Your shoulders are not perpendicular to the target, they are pointing left. And, your power points, elbow and wrist are also on a plane left of the target....meaning, your elbow is not far enough back for proper alignment.
Now, not everyone will be able to get all 3 on a parallel line, arrow, power points and shoulders...but the arrow and shoulders are pretty easy no matter the structure of the body.
I'd suggest trying to get a bit more extension with the elbow coming back a bit more, you are really close now....but do get your shoulders more perpendicular than so far to the left.
That's my take anyway.