Some analysts raised questions about YouTube's price tag. Critics said Google could be exposing itself to liability for copyright violations, since videos posted by users without permission of content owners are available through YouTube's site. The start-up already faces one lawsuit related to this issue. YouTube has been racing to sign deals with media and entertainment companies to license their content and head off any additional litigation, generally agreeing to share online ad revenue with the content owners. "The YouTube commitment to enforcing copyrights is very consistent with Google's," said David Drummond, Google's senior vice president of corporate development. Mr. Drummond said the two companies remove any infringing content when notified by a copyright holder.