For those who are not familiar with the breed, Sheep Dogs are a dog breed historically used in connection with the raising of sheep. Their responsibilities can vary from being used to guard sheep and other livestock in farms for formers, to herding sheep and other livestock. Based on the video, this sheepdog's job was to herd the large group of sheep.
When one lamb decides that he has had enough of this tyrannical reign, he approaches the sheepdog and steps out of the herd. The sheepdog is clearly not used to this kind of rebellion, as he does not handle the situation particularly effectively. Oh well, you know what they say. All bark no bite. That's not necessarily a bad thing though, we like to see issues resolved as peacefully as possible!
Enjoy this wholesome exchange!