Hulu has seen explosive growth since its launch last year, according to data from Nielsen Online. The online video site, which features television programming, grew a whopping 490% year-over-year in April. Here are the top online video sites for last month, with YouTube maintaining its number one position:

The demographic that has seen the most growth is the 35-49 age bracket with second place belonging to (drum roll please) the 65+ set. That's right. Your grandma is getting her Hulu on.

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