Complex sentence: On the July 1 episode, Mandel pressed the buzzer to save Emmanuel & Phillip Hudson, another comedy act and YouTube sens. As the audition round ended, Mel B and buzzer, or they did but their acts' auditions did not air.
Split into simpler sentences: On the July 1 episode, Mandel pressed the buzzer to save Emmanuel & Phillip Hudson, another comedy act and YouTube sensation. Either they did not use the buzzer, or they did but their acts' auditions did not air.