There are so many good ambient video channels on YouTube you could probably make a whole blog dedicated to them, reviewing them, saying which ones are best for what kind of tasks, etc.
There are so many good artists and thinkers and creators - it's really a boggling time to try to figure out what is best. But I think it's great to have a rubric of what you like.
This one is my favorite. I even considered giving them some money through a subscription which I never thought I would do on YouTube. I think that being a premium YouTuber is really enough to be honest. However, this is so great, and so handy when reading or writing that I am still considering it.
Spotify is great, but more often than not these days when I am working I click on something like this.