tracking workout videos on the fitness tracker on here!??

BlueJeanBabyQueen

this is probably a stupid Q but how do i track the number of calories i burned when i do a workout video?? i have a biggest looser dvd that i started. It is full of different kinds of workouts, like aerobics ect. But how do i do that on here?? just say like 30 minutes of cardio?? TY for the help