I agree with Apachie, and add that he needs some serious work on transitions. He was strung out on every one. I think the head tossing is his evade-the-bit method of choice, and when it's harder, like at the trot, he goes behind the bit.
Did they have video of him going to the right too? I'd say definitely ride him yourself, or ask your trainer to, to figure out if it's horse or rider. Good luck!