When choosing a seat, I specifically chose a seat with a railing next to it, and then fixed the camera on the railing. Therefore, most of the scenes in the video were not shot handheld.
I adjusted some parameters. For example, for iPhone, don't use the native camera software, but use a third-party video recording software that can adjust the parameters, record at 4k resolution, lower the shutter speed to the same as the inverse of the frame rate, in my case 25 frames of video, and 1/25 of a second shutter speed, and fix the ISO value to the starting ISO to obtain the maximum image tolerance. If you look closely, you can find that in the pictures of several songs, because I didn't set the ISO to the starting ISO, the most important stage part was overexposed.