Jack Wullems marketed a media player called 'Filmspeler', pre-configured with add-ons that allowed easy access to streaming feeds containing pirated content. He argued that he did not supply the content, only the device.
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The CJEU rejected that argument: supplying a device pre-configured precisely to facilitate access to pirated works constitutes a communication to the public and therefore a copyright infringement. It does not matter that the actual transmission comes from third parties.
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The decisive factor was knowledge: the seller knew that the add-ons allowed access to illegal content and actively promoted the device as a way to avoid subscriptions to lawful streaming services.
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This has direct implications for sellers of set-top boxes, IPTV devices and similar pre-configured products: if the product is sold with settings designed for piracy, the seller may be treated as a co-author of the infringement.