Viacom, Walt Disney
Interest in online video has boomed over the last two years, putting media content owners at odds with Web sites that host videos when their users upload copyrighted material without permission.
Google and its YouTube video-sharing site face a $1 billion copyright infringement suit filed by Viacom, for example.
"These principles offer a road map for unlocking the enormous potential of online video and user-generated content," Disney Chief Executive Bob Iger said in a statement.
The group also included News Corp.'s Fox and MySpace units, CBS
CNBC is a unit of NBC Universal.
Although Google was not part of the group announced at an Internet conference in San Francisco on Thursday, analysts said it will likely have to adhere to the set of guidelines if it becomes standard industry procedure.