He is talking about ripping audio from youtube videos. Sounds like the Iphone wont let you put any music on it unless its purchased through the apple store.
Are you sure? Most of the "music" on my phone is from YouTube videos which I converted to an MP3 format and then moved onto my phone. Perhaps they've changed that. That would be a shame.
I tried downloading apps that I thought could do it to no avail.
To do what exactly? And did you try moving the MP3s to your iPhone while it was plugged into a computer?
I converted YouTube songs to mp3s and then tried to download them on my phone. They wouldn't would download on any app. I don't have any mp3s on my computer. What app are you downloading your mp3s on your phone? iTunes?
Let me walk you through this.
1. Convert the YouTube video to an MP3 (no special program required, there are websites that can do this.)
2. Download the MP3 file onto your computer.
3. Plug your iPhone into your computer.
4. The iTunes program on your computer should automatically boot up and synch your phone to your computer.
5. From there you want to look for a drop down menu in the top left of the iTunes tab that says something like "add files to library" and click on it
6. Find the directrory in which you stored the MP3, then click on the MP3 and press whatever prompt allows you to continue.
7. On the right of the iTunes window/tab you should see your iPhone is connected. Simply drag the newly uploaded MP3 file from wherever it appeared in the iTunes library to your iPhone.
8. Click on your iPhone and seek out the option to synchronize, click that, and you should be done.