Ultra-HDTV/4K Explained

Ultra HDTV, or 4k, the ultimate in home video viewing, so advanced there is no programming for it yet, is explained:
See it here.

Dogs in Mid-Shake

1/2 B&W, 1/2 color, but fun:
See it here:

Ansel Adams-Interview w/ His Son

Here's a video about Ansel Adams with his son Michael, shot in Yosemite Valley.
It is a quite basic introduction to Adams and his work:
See it here.