Sir only thing I didn't understand is why you substract theta m again at 8:20? Earlier we rotated it by clockwise so we substract theta m but now we rotate it anticlockwise so we should add theta m...... and then we will also not get the unintended rotation in final output which wasn't even present in initial input because we only want a phase shift and not a rotation................. Kindly look into the matter and thank you for this video 🙏