This pattern is fairly consistant with every practice session. Focus on swinging to the finish of each swing after about the first 10 shots. I have started lessons with a Pro. After the lesson I practicefaithfully at the range. I tend to overanalyze things and 'overdo' the suggestions from the lesson.
Different people have different learning styles.
If you respond well to visualization, then yes, a video would be helpful. Any kind of video tape of someone with sound fundamentals will do and you might try editing that tape to have side by side swings of you and them. Many pros offer such a service such as Dan Strimple in Irving Texas. I had a shot to the green from the right side of the tree but it required a left handed shot. I was standing on the cartpath.