The first 10 minutes of the class are for students to watch a video. The co-teacher will enter the class, open Browser and then play a playlist on Youtube, then leave the class and enter another class to do the same action.

They have 100 classes at the same time, but there are only 20 co-teachers to handle this, which is why the co-teachers have to leave one class and enter another

Issue: When teacher/co-teacher leave the class, the Youtube video pause