People may use video chat to convince a young person to take part in a dangerous dare, to appear naked on camera or perform sexually suggestive acts. This can then be recorded by the watcher and be potentially used to threaten or blackmail. Inform young people that if someone ever asks them to do or say anything on camera that makes them feel uncomfortable then they can say no, end the chat and tell an adult they trust.
Remind them that it is never too late to tell someone.
They can also block or report a user to the website/service if the harassment continues.