The UK distributor has licensed BlinkBox the rights to about 156 episodes and 121 hours of programming that was made for Channel 4 and ITV.
The new titles, including 'Shameless', 'Serious and Organised', 'Derren Brown' and '10 Years Younger', will be added to BlinkBox on October 2.
This is the first step in a major expansion of BlinkBox's ad-funded video-on-demand library.
Michael Comish, chief executive of BlinkBox, said: "Companies within All3Media are leaders in independent production and [this] deal is a great example of how traditional TV distribution is evolving, with players across the value chain seeing the potential of online video."
also has content deals with Warner Brothers, Universal, Paramount, Aardman and Discovery.
This new partnership brings the total number of titles on the website to over 2000.