All your liked videos are at https://www.youtube.com/playlist?list=LL, and all your liked songs are at https://music.youtube.com/playlist?list=LM .

I would try using yt-dlp. First, download your cookies from YouTube into a file (e.g. youtubecookies.txt). I like the cookies.txt Firefox extension for downloading the cookies.

Then run:

yt-dlp --cookies youtubecookies.txt "https://music.youtube.com/playlist?list=LM"

There are a lot of options to yt-dlp, so you'll want to look into those.

get parabolic https://nickvision.org/parabolic.html

yt-dlp frontend

if youre on android, seal might work on you.

Liked Videos and Liked Music are private playlists, they have a generic URL and you can only access them by being logged in. I have two methods to download Liked Videos:

• Install a desktop app video downloader, most of them have the option to download an entire playlist.

• They also have an option to add a cookies file so you can download private playlists, such as Liked Videos or Watch Later

• Log in to YouTube in your browser

• Export the cookies from the browser

• Import them to the desktop app

• Download Liked Videos

That's what you're supposed to do, however i never got that to work. If it doesn't work, you can transfer all your liked videos from the private playlist to a public playlist. Here's what i do:

• Create a new playlist called Downloads, and make it public; it now has its own specific URL, unlike the generic URL of Liked VIdeos

• Install the YouTube Multiselect browser extention

• Use Multiselect to select every video in Liked Videos and add it to Downloads

• Use the desktop app to download the Downloads playlist

This is how i download my private playlists like Watch Later or Liked Videos, i assume it also works for Liked Music

Aren't the liked videos a playlist? I think you can pass a playlist to YouTube-dl and it download it. Maybe you're gonna need to pass credentials or the YouTube cookie for it.

You gave me an idea, if I can automate this, I can manage the fuck I want the stuff. Any good library/managers for music, like jellyfin?