Is it possible to watch Youtube videos on the Youtube App while multitasking I currently have Kit Kat 4.4. Is is possible to play a Youtube video in the background or while multitasking like checking email,  use other apps or surf the web on Android? As of right now, I have to have keep the Youtube app open and can't get the video to play in the background while I do other stuff on my phone.
Use multi task option of your phone. Your screen will be split into 2 parts, you can watch Youtube and do other stuff. You can also change the formation of the screen so 90% of the screen is browser/email etc en 10% of screen will be youtube for listening music.

I am pretty sure Android Kitkat can do that – I am doing it right now.