Youku Tudou (Chinese: 优酷土豆) is the result of the 2012 merger of Chinese internet sites Youku and Tudou, creating one of China's biggest video sites.

Prior to the announcement of the merger, Youku was the #11 website in China, and Tudou was #14. The chairman of the board is Victor Koo, the founder of Youku. The company had a stock listed on the NYSE, YOKU before being acquired by Alibaba Group on November 6, 2015. In December 2016 it reported it had 30 million subscribers.