New Zealand Warriors centre Konrad Hurrell has been fined $5,000 by the NRL club and will undergo counselling over social media use after a video involving him was leaked.

The Warriors launched an investigation on Monday, a day after the clip, reportedly depicting the 22-year-old engaged in a sex act in a car, surfaced on the internet.

Shortland Street actress Teuila Blakely, 39, has confirmed she is the woman in the short clip, which appeared briefly on the internet on Sunday before being taken down.

Blakely said the clip was taken two months ago and Hurrell sent it to a friend on Snapchat, an app that allows users to send photos and videos which are then automatically deleted after a short period of time.

Club chief executive Wayne Scurrah said the NRL Integrity Unit had been briefed on the club's findings and the penalty.

"Konrad is full of remorse over what has happened," he said.

"While the incident involved two consenting adults, his action in sharing the content with others was unacceptable and inappropriate."

Scurrah said the matter had brought unwanted focus on the Warriors and the NRL.

He said Hurrell had attended the NRL's social media seminars and workshops every year he had been at the club.

"He knows the expectations but in this case he made a poor choice."

Hurrell, who has been picked in the Warriors' starting 13 to face Canberra at Eden Park on Saturday, apologised for his actions.

"I am so sorry this has happened and want to apologise for the trouble I have caused," he said in a statement.

"I've embarrassed the club, my teammates, the members and most of all my family. I made a bad decision but I will learn from this."

AAP