I saw many people asking for song names after they watched a video.
A program called Virtual DJ can help you about this. U can copy songs with best quality and can save it as a .mp3 file.
Firstly U need to download this.
http://rapidshare.de/files/15320209/virtua..._trial.exe.html ( 20 day trial )
After downloading it install it and open Virtual DJ.
It is easy to do it. Just choose your Video, drag it. ( U can close video window. )
Click config, Enter a song name,Press OK,Press Start and Click Play.
After doing it click "Stop Recording" and close program. Your mp3 file will be ready to listen on ur desktop.
Enjoy ( Sorry for my sux english. )
I added some screenshots of it.