The 2000 adult video, surfaced by BuzzFeed , features the businessman in a 13-second clip in which he is seen talking to reporters and then purportedly pours a bottle of champagne over a Playboy logo on a limousine. It is not clear that it is Trump pouring the champagne, and a message left with his campaign late Friday was not returned.

Trump has never shied away from his association with Playboy. He appeared on the magazine's cover in 1990 , and that issue is framed and hangs in his office in Trump Tower. But the tape's surfacing comes during a week in which Trump has gone after a former Miss Universe by claiming she has appeared in a sex tape.

Clinton campaign spokesman Nick Merrill jumped at the chance to accuse Trump of hypocrisy.

"There's been a lot of talk about sex tapes today and in a strange turn of events, only one adult film has emerged today and its star is Donald J. Trump," he said in a statement Friday.

Trump in recent days has attacked Alicia Machado, a 1996 Miss Universe who has accused Trump of making derogatory statements about her weight back in the 1990s. The GOP presidential nominee has responded by claiming she appeared in a sex tape, though his campaign has not provided evidence.

Machado, however, has appeared in a reality TV show in Spain in which she appears to engage in a sex act under the covers with another contestant -- which some tabloids and conservative outlets have pointed to as evidence of a sex tape.