If you are using DeviceEventEmitter in the component where you initialize youtube component then comment out usage of DeviceEventEmitter and see if problem resolves or not.
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java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.FragmentManager android.app.Activity.getFragmentManager()' on a null object reference at com.inprogress.reactnativeyoutube.YouTubeView
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