I'm currently doing this as a full time job, so I've got quite some experience in this field.
I've got a few motion graphic video samples in my portfolio here in Freelancer. However, I have other works, in which I consider they have much higher quality and requirement standards, but due to privacy restrictions I can't show them publicly yet. I can, however, show them privately for reference purposes only, for you to evaluate wether or not this is what you're looking for.
I would like to have more information regarding your project guidelines (such as the length of the video, wether there are any pre-done graphic elements designed, etc), because it will affect the deadline.