Before the Polymer redesign, playlists used to have notes that you could add next to each video.

After the Polymer redesign, these were no longer visible. But editing a playlist took you out of Polymer, and then you could still edit the notes. Users could also see the notes of any playlist with the disable_polymer=True parameter.

But now, YouTube has implemented playlist editing in Polymer, and has removed the disable_polymer parameter. So now I can't access the notes to my or other people's playlists (to see, for example, what a deleted video used to be).

Is there a way to access and edit these notes, or at least to download them somehow, at least for my own playlists? I'm wondering if maybe Google Takeout will have the data.

Update:

I've taken a look at an old Google Takeout from December 2018 and the notes are indeed there. I'm going to try doing one now, and hopefully the data is still there.

It would still be nice to have some way to edit the notes, and view notes on other people's playlists.

Update:

I've just gotten a Google Takeout of my YouTube data just now and the notes are still there. So that's good.