How to download music onto an Iphone?

I might be getting an Iphone sometime soon so I would like to to know, how might I be able to put music on it?

You will have to rip music or download music on your computer. Move this into your iTunes. And Itunes will sync with your phone thus moving the songs over.

Copytrans.

Plug your iPhone into your computer (make sure you already have songs on your computer) drag the songs onto iTunes and they should download automatically.

Have you tried copying the URL from you-tube. Download KEEPVID.COM open folder on pc via chrome
and copy into the folder I hope this may be of some help.