I ran across this web site which provides near real time nature videos from their wildlife videographers in the field.
They provide free weekly video podcasts as well as a number of daily feeds within a few days of the video being shot.
I subscribed to the weekly podcast of marine footage, (mainly from the coasts of southern Africa), and have been impressed with the video quality of the 720p feed.
From their web site:
http://www.earth-touch.com/ "Earth-Touch is a wildlife documentary company. Our passion is to put people back in touch with nature, and so encourage us all to take better care of our natural heritage.
Over the last two years Earth-Touch has pioneered a rapid filming and production cycle using dedicated crews in the field, High Definition cameras and satellites.
Thus enabling wildlife to be filmed, packaged and broadcast to global audiences within 48 hours of it being shot.
From these daily feeds,Earth-Touch currently produces the following broadcast programming..."
Check them out.