Download videos and mp3 songs from sites like youtube and other

This is a new trick to download videos and mp3 songs from various sitesAll you need to have is firefox browser and firebug plugin Install Firefox and install firebug plugin and all set to goOpen the site and fire up firebug by pressing f12 keyNow play the song or video u want to downloadClick on the net tab of firebug and look for the biggest fileRight click on it and copy the link location and