"Google plans to begin accepting "preroll" and "postroll" ads, which will run before and after some YouTube video clips, according to one person familiar with the matter. The plan under consideration, this person says, would give companies that post video clips the option to sell such ads, and share the revenue with Google. YouTube has long forsworn such ads because consumers don't like them. But advertisers consider them highly effective."
More: Wall Street Journal:
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