The invention intercepts content transmitted between devices, content display devices and content source devices. A source can be but is not limited to being a set-top box. A display can be but is not limited to being a television. Interception can be but is not limited to HDMI pass-through, augmented reality glasses or brain scanning devices. The invention receives content from a source. The invention communicates with a content recogniser which responds with instructions describing modifications to the input content. The invention performs the instructed modifications outputting modified content to a display. Modification made to content can be but is not limited to prompting interaction with any other device such as but not limited to remote controls, mobile phones and tablet computers. The result of the prompted interaction can be but is not limited to launching an application on any device.