Turn on song-only mode:
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Learn more here. With a YouTube Music Premium membership, you can choose whether to listen to your music or enjoy the music video experience with a YouTube Music Premium membership. In song mode, you can listen to the music without loading a video. This allows you to continuously enjoy music from your favorite artists, even if you're experiencing low connectivity or video playback issues. In video mode, the music video will play whenever one is available - allowing you to enjoy a complete listening and viewing experience. You'll see the option to select Song or Video mode at the top of the screen. Tap Video to turn on video mode.