are they lip-synching?

Looks like a live performance… sounds like the recorded version… I don’t see any horns and there’s obviously brass in the song… but when they zoom in on the keyboardist it seems pretty convincingly synced up… I don’t see any mics but I suppose even in the early 60s they used boom mics sometimes.

Totally lip-synched. Obviously they’re not really playing: the instruments aren’t plugged in, and the drummer doesn’t even have a kit. The vocals sound too much like the record to be live.