The Special Extended Lord of The Rings DVDs have hours and hours of content from the WETA team
I've been watching stuff on Youtube, but I figured there would be some good ideas on here from people who have watched more than I have. What are some good documentaries to watch on prop making, building, costuming, makeup, etc...
The "Blood and Guts" subsection on Nerdist's YouTube is some good discussion on SFX makeups and effects.