He is saying that gymnastics and swimming are 2 of the major 3-4 sports that NBC will make sure they air in prime time. First, they cant force the IOC to broadcast everything live just for the US time zones. Gymnastics are much easier to air on tape with so many dead air breaks in between routines. Swimming (like track) needs to be live.
NBC cant air both of them live at the same time, fam. Someone has to be taped, and they are trying to cater to a bigger audience then people who have cable (hence the app that you dont want to get)
Also, the swimming are for medals tonight, while the gymnastics is just qualification.
Thank you for the info but check your tone