Here is another great video that was found by Stephen one of the VFX students that is currently studying on the course. He has manage to find this video that is related to what students are currently doing on the ZBrush, digital sculpture module. The video maybe very handy for those looking to push their skills to the next level:
5 Mistakes Every Artist Makes When Making Faces - Art Fundamentals
The video is done by the guys over at FlippedNormals. I would highly recommend subscribing to their channel, they have some very interesting stuff on there.