I’ve highlighted Snag Films and Snag Learning in the past. It’s been a while though so I thought I should point out that Snag Films has some great educational content available for free viewing. One great example of this is their National Geographic channel containing 75 full-length documentaries. You can view these videos online or use the iPad, Android tablet, and Kindle Fire apps to watch Snag Films.
Here is the beginning Last Stand of the Great Bear, one of the 75 National Geographic documentaries available on Snag Films.