In a bid to expand its portfolio of cloud-based computing services, International Business Machines Corp. has acquired Ustream Inc., a seller of video streaming services, in a deal valued at $130 million. Ustream adds to IBM's growing portfolio of video services and gives the company a stronger position in a market that could be worth $105 billion by 2019 as businesses increasingly use video as way of reaching customers, according to Steve Canepa, the general manager of telecommunications media and entertainment at IBM.