Do some research on the most recent security and data breaches and share them with your associates.
Talk with the cyber security manager or the general manager of security and show that your very serious and back it up with company's that have been hacked. If that doesn't convince them to up their game on security than if and when they do get hit they can't say you didn't tell them so. OR at least try to warn them and encourage them ahead of time.
IF the company has ever had a security breach before bring that up and ask 'you wouldn't want what happened in (month of and the year) to be a reapeat again would you?
Video's that show how easy it is to persuade a person into breaking normal security procedures may or may not work.Depends on the receiving end. Articles that show how successful black hat hackers are at what they do can be fuel to make security more of a focus in the office.
http://www.databreachtoday.com/news
https://www.identityforce.com/blog/2016-data-breaches
http://www.darkreading.com/cloud/big...d/d-id/1325865
Good Luck-