Script to harvest all song/title/album from the music.youtube.com/library/songs/ and export them to a .csv file

HarvestYoutubeCollection.js

var waitForContentSeconds = 10;
var bottomTrials = 0;
var pageHeight = 0;
function grabYoutubeList() {
	var AllNodes = [...document.getElementsByTagName('ytmusic-shelf-renderer')[0].getElementsByTagName('ytmusic-responsive-list-item-renderer')];
	AllNodes.shift(); // remove first "blend" element
	var harvestedTunes = AllNodes.map(t => {
		var items = [...t.children[3].getElementsByTagName('yt-formatted-string')].map(n => n.getAttribute('title').replace(/"/g,'”'));
		return `"${items[0]}", "${items[1]}", "${items[2]}"<br>\n`;
	});
	var resultWindow = window.open('', '');
	resultWindow.document.open();
	resultWindow.document.write('Title, Artist, Album<br>\n' + harvestedTunes.join(''));
	resultWindow.document.close();
}
function scrollToBottom() {
	if (pageHeight !== document.body.scrollHeight) {
		bottomTrials = 0;
		window.scrollTo(0,document.body.scrollHeight);
		pageHeight = document.body.scrollHeight;
		setTimeout(scrollToBottom, 1000);
	} else {
		if (bottomTrials < waitForContentSeconds) {
			bottomTrials++;
			setTimeout(scrollToBottom, 1000);
		} else {
			// We are at the bottom
			grabYoutubeList();
		}
	}
}
scrollToBottom();

Log in on your youtube account, go to "songs", and run this from the console (ctrl+shift+i).
Copy the content in the new window (you'll need to allow popups), and save it as a .csv file.

//Here is a script to get all your favorite artists from youtube too (the https://music.youtube.com/library/artists page). Does exactly the same thing, only with artists

var waitForContentSeconds = 10;
var bottomTrials = 0;
var pageHeight = 0;
function grabYoutubeList() {
	var kunstnere = [...document.getElementsByClassName('yt-simple-endpoint')].map(t => t.getAttribute('aria-label')).filter(t => t != null && t != 'Start');
	var resultWindow = window.open('', '');
	resultWindow.document.open();
	resultWindow.document.write('Artist<br>\n' + kunstnere.join('<br>\n'));
	resultWindow.document.close();
}
function scrollToBottom() {
	if (pageHeight !== document.body.scrollHeight) {
		bottomTrials = 0;
		window.scrollTo(0,document.body.scrollHeight);
		pageHeight = document.body.scrollHeight;
		setTimeout(scrollToBottom, 1000);
	} else {
		if (bottomTrials < waitForContentSeconds) {
			bottomTrials++;
			setTimeout(scrollToBottom, 1000);
		} else {
			// We are at the bottom
			grabYoutubeList();
		}
	}
}
scrollToBottom();