Well I don’t know if they stole the chord progression…it’s ridiculous to state that they did, as you can match up many chord progressions from a plethora of different songs, if you have endless hours to waste. Even if they did start out referencing the progression they certainly made it their own song in the end, which is all that really matters. The video shown here is pretty amazing as the musician Jack Conte plays all the instruments and even sings (pretty decently I might add) the Thom York parts. The songs are-
Radiohead- Exit Music for a Film (OK Computer)
Chopin- Chopin, Op. 28, no. 4
You can learn more about Jack Conte here. You can learn more about Radiohead by talking to any hipster…