You can try to install Aptoide TV on your Coolux S3. Aptoide TV is an APP store for Set Top Boxes and Smart TVs and mostly contains APP's re-uploaded from the Google Play. My smart pocket projector JMGO M6 ( http
/en.jmgo.com/product/m6) has a pre-installed Aptoide TV and i've installed YouTube, Netflix, Spotify, and Plex, and they are all functional. You go to http
/www.aptoide.com/, download the AptoideTV.apk, move the APK to your Coolux S3 using a flash drive, then install the APK file to see if it successes. Good Luck!