
The deal encompasses the history.co.uk, thebiographychannel.co.uk, crimeandinvestigation.co.uk and MilitaryHistory.co.uk sites.
The service will also extend to US traffic through Tremor Media's Acudeo technology, which will serve relevant ads from Tremor Media’s US network.
Pre-roll adverts will appear before short-form and long-form video content available on the websites.
AETN UK's managing director, Tom Davidson, said: "As a media company we offer a tremendous amount of video content across our consumer websites. The Acudeo ad management tool easily integrated with our system, giving us total control over the video advertising campaigns we run."
Adrian Lacey, UK managing director at Tremor Media, said: "Broadcasters are constantly striving to make their content work harder, while marketers are looking to advertise within desirable content that reflects their brand values and is watched by the right audience."