The teacher saw that Lydia was being stubborn.

She moved the mouse and clicked on the second video.

This one was a proper surveillance recording.

In the small makeup room, Lydia entered with her violin case and closed the door behind her.

Then, everyone saw in the footage that she went wild, angrily smashing her violin.

After destroying the violin, she placed it into the case herself.

Then, she opened the door and ...