You can download all your favorite music and videos to your phone. On the Sound Cloud channel, you can download it as mp3. On the YouTube channel, you can watch all your videos, listen to audio, and even download them without ads.
The Google Play Store basically forbids downloading YouTube. Download the apk file and install it or download it from another store.
The ZenTube Music Player is easy to use. You can reorganize your app with your favorite style. With Android Wear and Android Auto, you can enjoy your favorite music anywhere.