Video of Louis at a recent 1D concert shows him saying to the keyboard player: "You're not looking for fame. Oh wow, what a great musician." Later he appears to rant about Zayn, saying: "You've let me down, you've let these beautiful people down. What have you done?"
All is not what it seems, however, as those at the concert said there was more to the whole thing – Louis joked with the keyboard player, saying, "you've got nothing prepared?" before launching into the bit about fame. The rant about letting people down was also part of the conversation with the keyboardist.
If you give the videos another look, you'll see that Louis says "You've got nothing prepared" instead of "You're not looking for fame."