One of the most popular videos this month on YouTube, an online video site, is a commercial by a bottled-water firm, Evian. In it, adults walking by a shop window see their baby lookalikes reflected, and start dancing with their former selves. The grown-up YouTube, however, looks nothing like it did in its infancy. Once a warehouse for pirated clips and amateur footage of cats, YouTube has been trying to transform itself into a sleeker, more sophisticated site that can compete with televi- sion for advertisers. It will soon look even more like television. On May 9th it is expected to announce that it will charge users for subscriptions to some "channels".
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