Of you're like me and despise the Sonos app and the inability to use apps like you tube (well technically any app since the Sonos app only works 1 out 20 times). I've found this app called Air Music, that allows you to cast audio to your Sonos speakers using any music service or app/player/webpage that produces audio for Android, it's basically the closest thing to Apple Airplay that if found. I can just launch you tube or spotify or my local file player and cast the audio without having the headaches of being forced to you use Sonos beyond terrible interface, highly recommend it, it's been total ges changer for me and actually makes Sonos products useable.
https://play.google.com/store/apps/details?id=app.airmusic.trial