The hackers threatened to leak more information as HBO premieres another episode of season 7 of "Game of Thrones."

FOX's Michelle Pollino reports:

The fallout from the HBO breach continues with hackers threatening to release more information. Cyber-security expert Gary Millefsky explains just how much data was reportedly stolen:

(Milliefsky) "1.5 terabytes equals 750 hours of video footage."

But it's not just video footage worrying the company, it's info from employees emails:

(Millefsky) "This is a massive breach."

Millefsky says right now it's the tip of the iceberg:

(Milliefsky) "It's time for this industry to take cyber-security as seriously as the banks have for many years."

Michelle Pollino, FOX News.

Follow Michelle Pollino on Twitter: @MichellPollino