This is one of these Work in Progress personal animations that have a tendency to stay on the hard drive and just get fiddled with from time to time.
Model and texture maps by Lee Perry Smith Infinite Realities LTD. http://www.ir-ltd.net/
Rigging, animation, shading and shader technical by Vegard Myklebust at useful slug. https://www.usefulslug.com
Audio from Undisputed http://www.imdb.com/title/tt0281322/
The character is hand animated to the audio using a standard skeletal deformer and some custom deformers. The animation is tied to a series of texture maps with animated object space weight blending so that only a portion of the map can be faded in where needed. Color fluctuations are also in animated object space weighting to achieve differentiation of color for example on the lower lip as it gets stretched.