At the Facebook Stargate Official Fanpage:
There are two (short) videos from Stargate Continuum -- with added content:
Continuum Promo with cast
Continuum Promo with Michael Shanks - Link now goes to YouTube
The added content is a message inserted into the videos:
Buy Stargate: Continuum on iTunes on July 28 -- and get an EXCLUSIVE, FREE download of Col. Cameron Mitchell's backstory - written and narrated by Ben Browder!
Official Stargate Special Ops member