Simply

Seeing that Nuannuan's hands were moving faster and faster, especially on the left and right sides of the keyboard, her fingers were almost a blur on the keyboard. The crew members, Xia Anchen, and Wang Geng all widened their eyes.

When the general manager walked in, the first thing he noticed was how everyone's mouths were agape in awe. 

He was about to berate the server room supervisor for letting the chairman do this herself, but when he saw what Nuannuan was doing, he was astounded too.

Very soon, Nuannuan switched all 136 screens to start from 11:40 am.

Then, with a tap on the Enter key, all the screens started to play the footage taken since 11:40 am.

With the Bluetooth mouse in her hand, Nuannuan pushed the chair back with a loud swoosh. She only stopped retreating when she reached a spot where she could see all 136 screens.