1. ‘YouTube Removes Dead Extremist's Videos’;BBC News,2017
2. ‘YouTube Child Abuse Reporting System 'flawed';BBC News,2017
3. ‘Glitch in YouTube's Tool for Tracking Obscene Comments’;BBC News,2017
4. ‘The Disturbing YouTube Videos that Are Tricking Children’;BBC News,2017
5. ‘YouTube to Restrict 'disturbing' Children's Videos, if Flagged’;BBC News,2017