It can be useful looking at the top professional players to find out what it is that they do which makes them so successful when they are playing.
But, there are some hidden factors which you cannot see, however much you look at the player swinging for the ball.
Professional players are extremely fit and healthy and particularly have strong and flexible muscles.
This muscular fitness allows them to be able to better carry out the required movements that they use when carrying out the swing action.
By concentrating on strengthening those muscles which are used during the swing, you will find that you will better equipped to be able to copy the movements made by professional golfers when they are performing their golf swing.
You will need to work on the abdominal, leg, arm and lower back muscles as these are the ones that are mainly used during the swing action.
You should be able to easily find exercises for these on the Internet but it is best to find ones which are specifically tailored towards golfers as these will ensure you are working the muscle in the correct way needed to improve the swing action.
So if your muscles are stronger you should be better able to make use of the knowledge that you gain by looking at golf swing examples and more easily copy the movements that you have observed.