some videos may have the following address:
in such cases, exclude the end part from '&'
ie. the address that is to b copied from the above path is:
now open http://www.keepvid.com in a new tab, in that u will find a place to paste the copied address.
paste the above address in the space provided.
after that, u will b provided with 2 download links one as .flv & the other one as .mp4
Download the video in the desired format.