If your video is longer than 10 minutes it will not convert, this is a courtesy to others using the system.
Check first if it has "Topic" in the title or channel name, this may be an auto generated video by youtube, these aren't
currently accessible to Y23 and most other youtube downloading sites.
Why is my download not showing up?
Give it a couple of seconds, if it doesn't show up at all, contact support with the video url.
Why is my mp3 weird in iTunes?
There is an encoding issue regarding iTunes, we are working to resolve this