The teenager's activity on video file sharing site YouTube showed that he watched clips from various soaps and the horror film Saw.
In one video he posted featuring himself, he was excited about a new computer.
He's seen saying:
It has finally happened - I now have an iMac - I can now make bigger and better videos!
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The Government's Prevent campaign is "simply not trusted" by many British Muslims, the Independent Reviewer of Terrorism Legislation said.