I got frustrated partway through this experiment and decided to reduce the workload by cropping above the mouth and below the hairline. I thought the eyes would end up being the best part because I've animated pupil movement before, but honestly it's all in the eyebrows this time.
I'm pretty sure I know what I would do differently next time, but we'll see if I feel like tackling this one again down the line.
You are free to copy, distribute and transmit this work under the following conditions: