How to download video?

Arghhhh, I'm so sorry about this trouble on youtube download due toa copyright claim by Sony Music Recording,,,,oh...no!!!But some video on youtube can download normally.Hi I'm sorry if the "DOWNLOAD" link can not working properly.Please, click on video and then copy that url and paste it to www.keepvid.comDOWNLOAD!!!I'am sorry about it.....exampleclick on video and then click YouTube log0copy