The love between Romeo and Juliet was severe, and by the time they were seperated, they probably were feeling mad and severely anxious, as much as the video's German child was. As soon as the couple was seperated, Juliet started crying, not because of Tybalt, but because of Romeo's banishment. Her attitude towards her father also changed: she was not an obedient little girl anymore. The German child in the video was calm and possibly excited for whatever he was going to do with his computer, which could be compared to the moment when Romeo and Juliet were together. Then, whatever the child was doing started to go wrong and wasn't really working out for him, which could be compared to the part where Romeo and Juliet had to be seperated. Then, the child started screaming and destroying his computer, which could be compared to the part where Juliet was all depressed, sad, and disobedient towards her father.
