Is it possible to pre-download a YouTube video to view it later?
You should try to download Youtube Go from playstore, it has the ability to download the video you want and watch it wherever you are. This works offline too and when you prompt the download you can set the quality of the video you want to download

Take a look at here

https://play.google.com/store/apps/details?id=com.google.android.apps.youtube.mango&amp;hl=en_US