High (approx. 80 BPM) resting heart rate. Previously sedentary. My heart pounds hard and fast during T25 DVD workout - is actually feeling it normal?

Heart rate and exerc. Heart rate of 80 is still well within the normal range. If you have started an exercise program after being relatively sedentary - its not unusual that you might see an increase in pulse. As your body adjusts to the new exercise program and your cardiovascular health improves the pulse will lower. The pounding is simply your body letting you know its out of shape. Good luck.