A legal case concerning the sale of video-streaming set-top boxes that can access subscription content for free, begins on Tuesday.
So-called "fully-loaded Kodi boxes" have gained popularity, but the legality of their sale is in question.
Middlesbrough trader Brian Thompson is accused of selling equipment that "facilitated the circumvention" of copyright protection measures.
The trial has been described as a landmark case by industry watchers.
Mr Thompson will not enter a plea on Tuesday, but has told local media he intends to challenge the charges.