When you launch a tube site like that you will get sites like the OV Guide linking to it and a few others which I wont mention. There is another big site which will send you a shit load of hits because it tells people how to download your tube videos and believe me its very popular You will also most prob get a french site which normally links to tube sites and sends you a shit load of french traffic.
The uk traffic im not sure about but I do know that this happens cause I had exactly the same thing when I launched my tube and because its diff/long content it gets picked up a lot quicker
