When you book a golf lesson you need to make sure that your new coach is correctly qualified.
Its quite simple, when you book a golf lesson with or without a video, make sure your coach is PGA qualified. You can always check if the coach is qualified by asking to see their PGA membership card. If they cant show you the PGA membership card I suggest you walk away.
A member of the British Professional Golfers Association has had to go through the following training before becoming a full member of the PGA.
For further details of the PGA please visit the website here -> The Professional Golfers Association