A couple things you might find interesting based on questions you asked during the video: 1) Radiohead members met in high school and have been playing together ever since. Jonny pretended to know how to play to join his older brother’s band and had to learn as he went. 2) Most of the time when you wonder “what is that sound”, it’s a guitar. 3) There are 3 guitars: Thom, the singer, Jonny Greenwood and Ed O’Brien.