What YouTube API key to use for Android Ionic Framework app? (Browser or Android key)

Hi all,

I am using the Youtube api to call playlists into my app, as suggested by @mhartington to use the JukeTube Angular web app.

The thing is since I am creating an Android app, I am confused as to what key to use.

Is it the Browser key or Android key I am meant to use?

P.S: I tried both but I dont get any videos

Thanks in advance