A British youth working from a bedroom at his grandfather's house made 'slick videos' that could have inspired 2 US mass shooters, a court heard

• Far-right videos made by a British teen were viewed by two men who went on to commit mass shootings.
• Daniel Harris, 19, has been sentenced to 11 and a half years over the videos.
• A judge said the videos were "well-made and slickly produced" and might have influenced the killers.

A British teenager has been sentenced over far-right videos that might have helped inspire two US mass shooters.