Starz TV, available on Sky, broadcast the video for Minaj's song 'Beez in the Trap' on April 27 this year, at 2.20pm.
During its routine monitoring of the channel, Ofcom noted a sequence in the video featured flashing images, but was shown without prior warning for viewers who were susceptible to photosensitive epilepsy (PSE).
After carrying out a technical assessment of the flashing images, Ofcom noted that five distinct sequences in the video exceeded the brightness change and screen area limits set out in its guidelines.
In response, Channel Starz said that the video file had been provided by Minaj's record label and was marked as compliant with Ofcom's PSE guidance.
The broadcaster notified Ofcom that it went into liquidation on June 22, but this did not stop the regulator from issuing its rebuke.
Ofcom said that broadcasting the video could have caused "significant potential harm" to viewers with PSE, including the incidence of seizures.
"While Ofcom acknowledges that the licensee broadcast this music video in good faith, it is the responsibility of all broadcasters to ensure compliance with the Code before transmitting any material," said Ofcom.
"On this occasion the licensee had failed to check and correctly identify broadcast material as problematic in advance of transmission."
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