PragerU, short for Prager University, is a website that promotes conservative ideas using short educational videos. However, it is not a university and does not claim to be. Dennis Prager and Allen Estrin started this website in 2009. Prager appears in some of the videos himself. PragerU is suing YouTube for restricting 99 of its videos. But, PragerU has already lost several lawsuits against YouTube. 