How to download youtube videos to ipad without using a computer.

How to download youtube videos to ipad without using a computer??? Looking to download some videos people created using Dr. Jean music. My kid used Dr. Jean in preschool and wanted to keep singing them at home. 🙂

Looking for a friend that doesn't use a computer. I myself have downloaded some kids educational stuff and added to itunes and then put on ipod/ipad using firefox.

Is there an easy way, so they don't go to the photo roll??

thanks in advance.