video search tool(s) - any around?

Hi

I need to find quite a few different vids for a few things I'm working on and know there's quite a few different places people share vids - just wondered if there was any search tool that was available that just searches the video sharing sites so I don't have to trawl through loads of garbage results in Goggle to get what I'm after - online or offline tool would be fine

Thx in adv
RN