ciao how we get url of video in te tube plz anybody can tell me???? :)

Well, I usually do this way:
1)Search on Google: IDM (Internet Download Manger), download and install it to PC.
2)After finishing installation, go to Youtube cerca the video. There will automatically appear the line that say "Downlad...".
3)Click to start downloading.
Hope it'll help u! :)