He looks like with lots of riding and training that he would be a good horse but he is not show quality. My first impression is that for "a lot of handle" you need more than 120 rides and in the video, he is missing a lot of basics that every horse should know. He travels with his head up (though that could be corrected), with a tight rein (both may be due to the rider though), with a short stride with too much leg action, and when she applies pressure to the bit, he raises his head. He is also starting to nose through the bridle and sling his head because she has not properly introduced direct contact to him. Plus, he doesn't seem to know to follow his nose yet, she is attempting to turn him and he continues to go straight. That may be part of the training but that usually takes more time to get right than that so I am betting that it is a training fault. With time, he could be a great trail or "have fun" horse but definitely not show quality. He is way below the value of your horse and I would keep looking elsewhere. That horse has a lot of training gaps and faults to trade for your proven show horse.