Chinese eCommerce mega-corporation Alibaba and Yunfeng Capital, a private equity group founded by Alibaba founder Jack Ma, has agreed to buy an 18.5% share of China’s largest video website, Youku Tudou (YT). The stake will cost the pair $1.22 billion. Alibaba will hold 16.5% of Youku Tudou, with Yunfeng holding 2%. The share comprises 707 million new Class A shares and 14 million pre-existing shares. The purchase price of $30.50 per American Depositary Receipt stands at a 26% premium of the $24 that Youku Tudou stock last traded at on the New York market. The deal comes after Alibaba has previously invested in two other Chinese video companies. In March this year, Alibaba invested $804 million into ChinaVision Media Group…