And this video is a video of Keith Jarrett, who's a well-known jazz improviser and probably the most well-known, iconic example of someone who takes improvisation to a really higher level.
这是基思·杰瑞特Keith Jarrett的一段录像，他是著名的即兴爵士作曲家， 估计他也是能将即兴创造升华到非常高超境界 的最著名，最有代表性的人物。