[youtube] video not getting video "chapters" properly

The ‘chapters’ value from the JSON (-J parameter), is usually present on some video. But since a few days, it is not available in ANY video. My guess is that’s since the new chapter UI of youtube.

Here’s a verbose excerpt from youtube version 23.04.2020, not that it looks very useful

[ ~ ] $ youtube-dl -vJ https://www.youtube.com/watch?v=gBRKnvK1JUE 
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-vJ', u'https://www.youtube.com/watch?v=gBRKnvK1JUE']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.03.24
[debug] Python version 2.7.16 (CPython) - Linux-4.19.0-8-amd64-x86_64-with-debian-10.3
[debug] exe versions: ffmpeg 4.1.5, ffprobe 4.1.5
[debug] Proxy map: {}
[debug] Default format spec: bestvideo+bestaudio/best
{"upload_date": "20190921", "extractor": "youtube", "chapters": null, ...

[someziggyman]

Chapters are still NULL in 2020.07.28 release

[VolatileCable]

This seems to have broken again in 2020.06.16.1 .

The JSON chapter tag is just null with both the mentioned https://www.youtube.com/watch?v=gBRKnvK1JUE and also https://www.youtube.com/watch?v=Vr93xAFmJag . They also have different formats in the description.

I found this while investigating if youtube-dl writes these chapters to mkv files. This is not the case, even if this were working in the first place, right?