The monitor said that we can't dig videos any more, which means that some people have been watching videos, playing games or browsing other irrelevant content during their study or work, and this behavior will affect others' study or work efficiency. Fast-forward, skip or repeat some clips when watching video, and sometimes watch other irrelevant content when watching video. So the monitor said we can't dig any more videos, because we want everyone to concentrate on their studies or work, and don't be distracted by other irrelevant content to improve efficiency and work quality.