How to get youtube videos on your iphone? (Audio only)?

I wanted to get videos off youtube onto my phone, I only need the audio. Any help? (If I could get video to that would be nice) Thanks!

Nope.

If you wan't to transfer audo file to you phone got to youtube to mp3 site there's tons of them.

Apple allows only syncing video from your computer (iTunes)… So Download videos from Youtube(Mp4 format) first than upload it to your iTunes than sync with your iPhone.

You can download videos from Youtube, Google Videos, Metacafe and more in FLV, MP4, AVI, MOV, MPG or WMV formats using http://savevid.com website.
Follow these 3 steps to download your favorite video:

1. Copy Youtube URL
2. Open SaveVid website
3. Paste URl and click download by selecting the format.

See complete instructions here:
http://sansalabs.com/howtoguides/how-to-download-video-from-youtube-3-easy-steps/