NASA is broadcasting a High Def video compilation of earth views, with narration/discussion by a scientist that'n been involved with astronaut photography:
http://www.space.com/news/080418-nasa-hd.html
NASA aired the HD broadcast on NASA TV early Friday as a silent film of serene Earth views. A replay is scheduled for the same time on Monday, and will air all day long from 6 a.m. to 8 p.m. EDT (1000-1200 GMT) on April 22. The replays include a discussion of the Earth views by Justin Wilkinson, a scientist with the Crew Earth Observations Office at NASA's Johnson Space Center in Houston.
The footage will also run on standard NASA TV during regularly scheduled Video File broadcasts.
The astronaut-shot Earth views mark the latest in a series of efforts to view space in high-definition video, whether looking at Earth, the moon or spacecraft interiors.
