A CNN reporter contacted the beverage giant to explain a Bud Light video had been spotted on YouTube in conjunction with an ISIS video.
The videos had removed by this time, having been flagged by the YouTube community.
YouTube automatically inserts adverts before videos. Advertisers can specify the demographic they want to target, but do not have control on specific videos, according to CNN Money.
Anheuser-Busch said in a statement: “We were unaware that one of our ads ran in conjunction with this video.
"We have strict guidelines with our media partners that govern when and how our ads appear. We are working with YouTube and our media buying agency, Mediacom, to understand and rectify the matter.”