PRODUCE X 101 [X101 BEHIND] 'Don't Miss The First Episode!' The Trainees' First Episode Monitoring Behind The Scenes

X101 BEHIND are a series of the PRODUCE X 101 trainees' behind the scenes. The fourth X101 BEHIND episode is titled "'Don't Miss The First Episode!' The Trainees' First Episode Monitoring Behind The Scenes" and is a behind the scenes of the trainees watching the first episode together, after the PRODUCE X 101 SPECIAL V LIVE COUNTDOWN X.