Constant noise, or intermittent? If intermittent, with every crank revolution, regularly but only every 2-3 crank revolutions? Random?
Constant clicking could be a dry chain or loose chainring bolts.
If it's every crank revolution, it could be a bent tooth on the chainring or a bad bearing in a pedal, a shoelace hitting the frame or crank arm, a loose saddle rail, loose pedal cleats, etc.
If regularly but only every 2-3 crank revolutions, it could be a tight link in the chain.
Noises can be difficult to track down, especially via remote viewing like this.