YouTube says it is “very sorry” after more disturbing videos were found on the YouTube Kids app.
Newsround found several videos not suitable for children, including one showing how to sharpen knives.
Another had characters from children’s cartoon Paw Patrol on a burning plane.
YouTube has been criticised for using algorithms rather than human curators to decide what appears on YouTube Kids.
I still don’t understand why this is taking them so long to get right.