@haniva Opera adds a Music Player with Spotify, Apple Music and YouTube Music to the sidebar
https://blogs.opera.com/desktop/2020/11/opera-player-spotify-apple-music-youtube-music/

To resolve the following errors:

{
m.youtube.com blocked
m.youtube.com refused to connect.
ERR_BLOCKED_BY_RESPONSE
}

Go to 'settings' then uncheck the 'mobile view.'

@erkulensar: open 'settings' then uncheck the 'mobile view.'