video above.O’Brien wrote for “The Simpsons” in the early ’90s after writing on “SNL.” He left “The Simpsons” when Lorne Michael pitched him to take “Late Night” over from David Letterman.The long-running Fox animated comedy put together the below “exit interview” for O’Brien’s final TBS episode.Seth Meyers, the current host of NBC’s “Late Night,” signed off with a salute to O’Brien, though that moment didn’t make YouTube.