Before you skip everything in this video and run straight to the comments, understand the question: Many (not "most"; not "all") shooter video games feature licensed, real-world firearms. Gunmakers are compensated for the appearance of their brands as much as the NFL Players Association is paid for its members appearing in Madden. Does this present a moral choice to a video gamer?
This is not equating video game violence to real-world violence. The narrator of this piece, Mike Rugnetta of PBS' Idea Channel, explicitly says so. But if you are disposed against the firearms industry and its chief lobbyist, the NRA, which uses video games as an intellectually dishonest diversion in its argument against any form of gun control, you should consider that which you buy.