¿Ver material extremista es un delito de terrorismo?

¿Constituye un delito específicamente en virtud de la legislación antiterrorista ver un vídeo?

Ver un video no es , en sí mismo, un delito penal.
Ver un video que fue producido para promover el terrorismo no es , en sí mismo, un delito penal.
Ver un video de entrenamiento terrorista con la intención de cometer actos terroristas es un delito penal.

Según el comentarista legal David Allan Green , la ley relevante es la Ley contra el Terrorismo de 2006, secciones 1 y 2.

La Ley de Terrorismo de 2006 tiene tres partes, el contenido de las partes 1 y 2 son

Part 1 Offences
  Encouragement etc. of terrorism
    1.Encouragement of terrorism
    2.Dissemination of terrorist publications
    3.Application of ss. 1 and 2 to internet activity etc.
    4.Giving of notices under s. 3
  Preparation of terrorist acts and terrorist training
    5.Preparation of terrorist acts
    6.Training for terrorism
    7.Powers of forfeiture in respect of offences under s. 6
    8.Attendance at a place used for terrorist training
  Offences involving radioactive devices and materials and nuclear facilities and sites
    9.Making and possession of devices or materials
    10.Misuse of devices or material and misuse and damage of facilities
    11.Terrorist threats relating to devices, materials or facilities
    12.Trespassing etc. on nuclear sites
  Increases of penalties
    13.Maximum penalty for possessing for terrorist purposes
    14.Maximum penalty for certain offences relating to nuclear material
    15.Maximum penalty for contravening notice relating to encrypted information
  Incidental provisions about offences
    16.Preparatory hearings in terrorism cases
    17.Commission of offences abroad
    18.Liability of company directors etc.
    19.Consents to prosecutions
  Interpretation of Part 1
    20.Interpretation of Part 1
Part 2 Miscellaneous provisions
  Proscription of terrorist organisations
    21.Grounds of proscription
    22.Name changes by proscribed organisations
  Detention of terrorist suspects
    23.Extension of period of detention of terrorist suspects
    24.Grounds for extending detention
    25.Expiry or renewal of extended maximum detention period
  Searches etc.
    26.All premises warrants: England and Wales and Northern Ireland
    27.All premises warrants: Scotland
    28.Search, seizure and forfeiture of terrorist publications
    29.Power to search vehicles under Schedule 7 to the Terrorism Act 2000
    30.Extension to internal waters of authorisations to stop and search
  Other investigatory powers
    31.Amendment of the Intelligence Services Act 1994
    32.Interception warrants
    33.Disclosure notices for the purposes of terrorist investigations
  Definition of terrorism etc.
    34.Amendment of the definition of “terrorism” etc.
  Other amendments
    35.Applications for extended detention of seized cash

Sección 6 La capacitación es

(2)A person commits an offence if—   
  (a)he receives instruction or training in any of the skills mentioned in
     subsection (3); and   
  (b)at the time of the instruction or training, he intends to use the skills
     in which he is being instructed or trained—
     (i)for or in connection with the commission or preparation of acts of 
        terrorism or Convention offences; or
     (ii)for assisting the commission or preparation by others of such acts 
         or offences. 
(3)The skills are—   
  (a)the making, handling or use of a noxious substance, or of substances of 
     a description of such substances;   
  (b)the use of any method or technique for doing anything else that is capable 
     of being done for the purposes of terrorism, in connection with the commission 
     or preparation of an act of terrorism or Convention offence or in connection 
     with assisting the commission or preparation by another of such an act or 
     offence; and   
  (c)the design or adaptation for the purposes of terrorism, or in connection 
     with the commission or preparation of an act of terrorism or Convention 
      offence, of any method or technique for doing anything.

Parece cuestionable que un juez y un jurado puedan ser persuadidos de que ver cualquier video de una decapitación constituye recibir capacitación y, a menos que haya evidencia de la intención de usar esta capacitación, no podría resultar en una condena. Hay otras secciones, pero no veo ninguna sugerencia explícita en el texto de que ver un video de una decapitación sea en sí mismo un delito terrorista según esta ley. Obviamente, la interpretación de la ley es un asunto de los tribunales.

Según El Registro

Ver el video podría usarse para construir un caso contra nosotros, nos dijeron, pero este acto por sí solo no proporcionó pruebas suficientes para encerrar al espectador en Belmarsh.

"La distribución es el problema", dijo el vocero. "Ver el video podría tenerse en cuenta si surge alguna otra información".

Por lo tanto, es poco probable que simplemente ver el video conduzca a un arresto. A menos que ya haya cometido otros actos que puedan interpretarse como evidencia de la difusión de materiales que promueven el terrorismo.