Sparks And Me Liberty - Unfenced 5 acre area

My 11 year was video taping so excuse the quality. I love Sparkles arc into me when he is circling - so connected!!!! Sparks left his hay to play and was in a huge unfenced area where he could go back with the other horses if he wanted. He has a very high play drive which is why I was playful with him BUT he also geta worried easy really easy so I have to give him the time he needs. Also, Sparkles has a huge amount of white hairs on his back from bad saddling/riding with previous owner. He used to walk off constantly when being mounted and bit as well but now, he will calmly stand at liberty at the mounting block.