Don't have a vid. I probably can't describe by words as far as what to look for, so I would suggest get with someone that can show you hands on.
Are you going to sell local? If so get with that person.
Feel for the ears with your hands should feel like a slight pop. Make a good cut and make stick your finger in there some and keep going till it's not attached. The eyes you will feel jello. Cut slow and you will start to see where you need to cut.