The Keep it to your selfie campaign is urging teenagers to #pausebeforeyoupost and think about the consequences of sharing images online.
It is estimated that as many as 75,000 paedophiles are online at any one time making it vitally important that young people know exactly who they are talking to on the internet.
Three videos have been produced to support the online campaign, which is aimed at boys and girls aged between 11 and 18.
This is the third and final video in a series that we have posted over the last three weeks.
York police are appealing for the public's help to locate a man who is wanted on recall to prison.
On which social media sites do you follow North Yorkshire Police?