Provided video gives you detail information about the development of intricacies of face along with pictorial diagrams making it very interesting to learn about it. Timeline: 0:00:introduction 1:23:epiblast 1:29:ectoderm,endoderm,mesoderm 1:51:neural folds 2:41:cross section of facial region 2:54:frontonasal,maxillary,mandibular prominences 3:08:nasal,optic placodes