Canon teaches (1D X AF, Cinema EOS FAQs), Nikon podcasts (verb)
Canon is on a teaching spree today, they have published a new article on the 1D X auto focus system, focusing (pun intended!) on auto focus points and area selection... Meanwhile, at a different Canon page, they have published a long FAQ on the Cinema EOS.
On the Nikon front, they have posted a Photo Plus podcast, talking CX mirrorless system and more. Podcast is around 14 minutes long.