A prominent YouTube star has lost a lucrative contract after The Wall Street Journal pointed out a series of anti-Semitic jokes and Nazi-related images in his videos. Felix Kjellberg is better known as PewDiePie — a profane, prolific video producer and comedian. He rose to prominence largely through videos of him playing video games, but now creates a wide range of popular videos, from pranks to sketches to commentary. He's the most popular video producer on YouTube, with more than 50 million subscribers. His videos have been watched, collectively, billions of times. In a report on Monday , the Journal noted that Kjellberg's popularity led to a "multimillion-dollar" deal with Walt Disney Co., which owns Maker Studios, a firm that handles Kjellberg's business. The newspaper continued: "Since August, PewDiePie has posted nine videos that include anti-Semitic jokes or Nazi imagery, according to a review of his channel by The Wall Street Journal. "On Monday after the Journal contacted