First, it looks like you accidentally linked the same file for both examples.
Second, while videos or image files are helpful for assistance with render issues, it's usually best to post your project file so that anyone trying to help can see every detail of your scene. It may just be a case of keyframe interpolation, but without seeing the project file it's hard to tell.
In reference to Adam's first observation, have you researched gimbal lock, and how to avoid it? And again, by watching only a video, and without a project file, we can only guess at what you're trying to do.