yitayningwut:
To answer yout question on RCK: The Yerushalmi Kesubos, 5-6, says that Shmuel rememberd his midwife and Rav Yochonon rememberd his Mohel. These were Amoroim. Certanly Tanoim were even greator. Current babies cannot be compaired to them. (Also, could be the BM makes a difference as opposed to a tape)