Something missing in Driver swing

I’ve had a lot of troubles with my driver swing recently, but I couldn’t figure out the main reason. I’ve analyzed my swing and learned a lot. So, I know I have several problems with my swing. Still, there must be one big reason for shorter distance…

I finally went to driving range today getting out of my backyard. I felt I hit balls well with my driver. When I took a video, it looked something was missing. It is not only about the impact position.

Oh.. that may be a shoulder turn.

Endless problems.. When you try to fix one thing in golf swing, other unexpected problems come out again.