Brian Steinberg Senior TV EditorViacomCBS said second quarter profit rose as advertisers spent more robustly on its media assets and the company saw new revenue from a host of streaming initiatives.The New York owner of the CBS broadcast network, Showtime, Nickelodeon and the Paramount movie studio, said revenue rose 8% to $6.6 billion, fueled by gains in ad sales, fees from affiliates and streaming activity.