My tennis coach wants to film me playing tennis?

idk if this is wierd or normal but my tennis coach who is a guy in his 20's says hes gunna bring his video camera to film me doing my forehand and backhand swings cuz he says thier rlly impressive. i dont knwo what hes gunna do with it..i guess so i can watch it after he films me?idk but i find it kinda creepy. im a girl, and 15. should i just let him?btw its private tennis lessions