I will tell you to download YouTube videos to your iPad / iPod to an app that you can watch your saved videos and music without wifi :D
1) Go to the Apple app store on your apple product, open it up and search up the application called " Video Downloader Lite Super - Vdownload "
2) Once downloaded and open the app , you will end up at a screen which is Google
3) Go up to your bar and type in YouTube or whatever site you use (Picture below) I recommend YouTube for this because it is simple and easy
4) Type in whatever song you wan't in the search engine like you normally would and click go!
5) Once you search it up pick whatever video you wan't
6) Once you are in the video usually an ad pops up like it normally would on YouTube and with it it will say download. Don't click it or you will download the app just skip the ad and go straight to the video
7) Once at the video the same button will pop up once the video starts to play (if the button does not show up just press your finger on the screen where the video is and hold till it pops up)
8) you will come to a screen to save it and it will say file name, seeing as the song I choose was all about that base I named it "all about that base.mp4" but you can name it whatever you wan't
9) once you do that it will take you to another screen which shows the download, most of the time these upload pretty fast depending your internet speed.
10) once you are done the download it will take you to your files and you can play it from there with or without internet and you can also leave the application and do other stuff and it will play just like your music would.
I could not include a lot of pictures so I hope that I made the instructions simple but clear enough for you to understand seeing as the app is not hard to operate and usually easy enough to figure out. I found this when I was trying to download videos from YouTube to my camera roll but realized it was not the app for me but came in handy when I wanted to just sit back and listen to music
I hope you guys enjoy it and have fun ^-^