A screengrab of a YouTube video of the game Walking Dead from the Swedish gamer known as PewDiePie. Videos of people offering commentary while playing video games are wildly popular on YouTube. YouTube/PewDiePie hide caption

itoggle caption YouTube/PewDiePie

Kevin Spacey (left) and Robin Wright star in House of Cards, directed by David Fincher. The Netflix series, which follows a Machiavellian politician, is an adaptation of a BBC series of the same name. Hear an interview with Spacey and Fincher. Patrick Harbron/Netflix hide caption

itoggle caption Patrick Harbron/Netflix