视频中展示了一只山魈站在草地上，背景是几块大石头。山魈的面部有鲜艳的红色和蓝色斑纹，身体覆盖着深色的毛发。它先是面向镜头，然后转过头去，张开嘴巴，露出牙齿，似乎在打哈欠或发出叫声。随后，它又转回面对镜头，头部微微晃动。整个场景显得非常自然和生动。
The video shows a mandrill standing on a grassy area with rocks in the background. The mandrill is facing the camera and appears to be yawning or vocalizing, as its mouth is open wide, revealing its teeth. The mandrill's distinctive colorful face, with bright red and blue markings, is clearly visible. After a moment, it closes its mouth and looks around. The scene is calm and natural, capturing a moment of the mandrill's behavior in its environment.
A baboon with a distinctive red and yellow face and dark fur stands on a grassy area with a rocky background. The baboon initially faces forward, then begins to turn its head to the right. It continues to turn its head further to the right, opening its mouth slightly. The baboon's mouth opens wider as it looks to the right. The baboon then starts to turn its head back to the front, closing its mouth. Finally, the baboon faces forward again, with its mouth closed.