On YouTube, monetization happens in 2 ways:
From ads running on videos.
From paid subscribers watching/listening ad-free.
Regardless where the money comes from, it's common to earn less than one cent per stream on YouTube. But how much you earn from each stream can vary greatly, depending on what country the watcher is from, how much the advertiser paid, how popular the video is, etc.
In general, a stream on YouTube earns you less than a stream on Spotify or Apple Music.