I love this. What would be amazing is if there was a command line program that would download a playlist like this and push it to my iPhone (sync to Music app)

I love this. What would be amazing is if there was a command line program that would download a playlist like this and push it to my iPhone (sync to Music app) so when I'm driving or traveling on an airplane I can simply ask Siri to play these songs without touching my phone or worrying about internet connectivity. I currently do this with youtube-dl, I can download a playlist on youtube with it (best audio format) and then use Music to sync to my iPhone which involves 2 more steps than I'd like it to.