Parents who have children with access to the "YouTube Kids" app say they are concerned over graphic videos slipping by the website's filters.

Some parents have been complaining that the app has been letting what they say is inappropriate or strange videos play on it.

"It is horrible because I got the app just so that I could make sure they are watching safe stuff," says Deborah Polanco, of Massapequa.

Parents across the country are posting online that they have seen questionable videos titled with the names of popular cartoons or characters.

Lance Ulanoff, of Mashable.com, says that while YouTube's filtering algorithms are good, nefarious content creators can slip bad videos on to the app.

"The fact of the matter is the technology is still not at a place where it can capture or stop every bit of this objectionable content," he says.

In a statement to News 12, a YouTube spokesperson says the site uses machine learning and advanced technology to remove objectionable content. The company says it tries to act quickly when questionable videos are brought to its attention by parents.