A video by Instagram user @samuel_and_germanshepherds shows a German Shepherd named Rex carefully watching over his baby brother and keeping him steady as the child explores the world around him. The video was shared by Yahoo Scout, which uses AI to generate key points from this article, which may not always match what's in the article. The dog's calm behavior indicates he understands the importance of protecting his brother and child. German Shepherds are known for their intelligence, loyalty, and strong protective instincts, but can also be gentle family pets when raised in a loving environment. The adorable video quickly received widespread attention from viewers who shared their own experiences growing up with German Shepherds.