Invoke a Workflow from a YouTube video on my iPhone -> Dropbox file gets appended with all the details of video -> Hazel is watching this file and triggers the Python script -> which converts the video to MP3, slaps on relevant tags and cover-art and uploads it to my iCloud Music Library [1].
So I can have an MP3 song on my iPhone minutes after I’ve watched the video on YouTube.
[1] I do have Apple Music & Spotify [2], this is primarily for live/rare versions, and piano covers that I like.
[2] need both for testing, “officialy” launching https://www.musicbutler.io soon. /shamelessplug