For many young players of the hit video game Fortnite, watching it being played is as compelling as playing it themselves.

The battle royale game, which pitches up to a hundred players against each other in an all-out online death-match, has spawned a host of professional steamers, who can make millions a year broadcasting their matches.

The surging popularity of the game, especially with teens and children, has seen viewing records on the most popular streaming site, Twitch, smashed in recent months as celebrities such as the rapper Drake and England stars Harry Kane and Dele Alli have streamed their Fortnite games.

However, the influx of young Fortnite fans comes as Twitch has struggled with sexualised content appearing on its feeds and in February introduced new guidelines to clamp down on "suggestive" behaviour.

Yet in the last week the Telegraph found a number of incidents of sexualised and suggestive content such as a streamer telling his girlfriend to remove her top while broadcasting and a female streamer being asked explicit questions by commenters.