The $1.65 billion stock deal included around $15 million in funding which Google provided to YouTube between signing the deal in early October and closing the deal this month.
YouTube has enjoyed explosive growth over the past year and in the process, pioneered a new grassroots online video star-making system, as Web viewers seek out short-form comic sketches created by other users. San Bruno, California-based YouTube says it serves up more than 100 million videos a day.
But its popularity has also been fueled by the widespread availability of copyrighted TV episodes and music videos for which media companies say they should be compensated.
Media industry sources in recent weeks have said that some portion of the price paid by Google would be reserved to settle potential copyright infringement suits aimed at YouTube.
Meanwhile, Google and YouTube have said they are racing to strike deals with video producers that would allow them to share in revenue when such programming appears on YouTube.
YouTube Co-founder and Chief Executive Chad Hurley said that Google's backing will provide his company with the flexibility to continue to offer innovative services, but also emphasized that the company would remain independent.
Speaking at a Stanford University conference on Saturday, Google Chief Executive Eric Schmidt was asked whether the YouTube deal was evidence of a new stock market bubble comparable to the late 1990s dot-com era.