I can´t download the next link on youtube!

I try to download in mp3 the next links on youtube:

https://youtube.com/watch?v=B8TJ-xcSKRQ
https://youtube.com/watch?v=npzCVRgfZqM
https://youtube.com/watch?v=9cfRRkUeWaI

But it gives me analysis error.

Thanks in advance.