This video demonstrates the Root Motion Computer component that I created for Mixamo for use in Unity projects. The component is designed to let animation data drive a character's motion in space as an alternative to using in-place motions. An example project containing the component (and all of its source code) is available as a free download from Mixamo: http://content.mixamo.com/mixamo_animationdrivenplayablecharacter.zip
NOTE: There are a couple of bugs present or documented in the video that I actually managed to fix before the final version went live. Everything should be fine if you download the project.