Complex sentence: The game's developer, Wild Games Studio, alleged he violated its copyrights, arguing that he shouldn't be able to earn advertising revenue from a video that is based largely on gameplay footage from a copyrighted work.
Split into simpler sentences: The game's developer, Wild Games Studio, alleged he violated its copyrights. The company argued that he shouldn't be able to earn advertising revenue from a video that is based largely on gameplay footage from a copyrighted work.