You shouldn't watch videos loudly because it's disturbing to people.
Steven is surfing the Internet late at night and comes across an interesting looking video.
Steven wants to watch the video.
Steven turns down the volume to a quiet level before pressing play.
Steven plays the video at a very high volume.
His mother never hears the video and is able to sleep soundly through the night.
His mother wakes up from the noise and becomes very angry with Steven.