Sites to download clips of youtube

I tired this site to get some clips form youtube to make an entrance. It was working fine the download but I couldnt use it on windows movie maker of player it on windows media player. Below is the site I used. Anyone know anyother sites they used that can work??

http://www.savevid.com/

this is a good site too for that http://keepvid.com/

Tried that site when you told me about it on chat after I typed in the URL it had a few links and nothing happened. But I used youtube video covnerters so my entrance is halfway done