Updated /platforms/android/src/com/myappproj/app/CordovaApp.java file

Add following line below import org.apache.cordova.*;

import android.webkit.WebSettings;

and following inside "public void onCreate(Bundle savedInstanceState)" function above "loadUrl(launchUrl);" statement

WebSettings ws = super.appView.getSettings();
ws.setMediaPlaybackRequiresUserGesture(false);

Reference:

http://blog.blairvanderhoof.com/post/78586868260/getting-the-html5-video-tag-to-work-in-cordova-for
https://gist.github.com/blairvanderhoof/9380545