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Autobus Primeleft a comment
It definitely picks up a lot more than Youtube. Lots of results from Dailymotion, metacafe, archive.org which I don't usually see. I did a search for some obscure Italian cartoons and managed to find more than usual. Pros: It picks up a variety of sites Cons: Might be cool to see some relevance score for results and reasons given for it
PETEY VIDPrivate Video Search Engine - Search Beyond YouTube