youtube.com --get-description is downloaded abbreviated to ~160 characters.

[probe0]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.06.16.1
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

^'Or rather was made broken'
^'youtube-dl --version
2020.06.16.1'
^'X65xLj4fqmM' = 'https://www.youtube.com/watch?v=X65xLj4fqmM'
^'youtube-dl -v --get-description -- X65xLj4fqmM'
^'is:issue is:open youtube description'

Verbose log

youtube-dl -v --get-description -- X65xLj4fqmM
[debug] System config: []
[debug] User config: ['-4', '--write-description', '--write-info-json', '--write-thumbnail', '--all-subs', '--rm-cache-dir', '--exec', 'python "%APPDATA%\\youtube-dl\\(_Download Comments from Filename.py" {}', '-o', '%(title)s-%(display_id)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['-v', '--get-description', '--', 'X65xLj4fqmM']
[debug] Encodings: locale cp932, fs mbcs, out cp932, pref cp932
[debug] youtube-dl version 2020.06.16.1
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.14393
[debug] exe versions: ffmpeg 4.2.3, ffprobe 4.2.3
[debug] Proxy map: {}
WARNING: video doesn't have subtitles
[debug] Default format spec: bestvideo+bestaudio/best
Our first in a series of clip compilations from twitch.tv/gmhikaru Watch my live shows on Twitch ➡️ https://twitch.tv/gmhikaru Play chess on Chess.com ➡️ htt...

Description

WRITE DESCRIPTION HERE
See 'https://www.youtube.com/watch?v=X65xLj4fqmM':

Video description <C-c><C-v> from page itself:

Our first in a series of clip compilations from twitch.tv/gmhikaru

Watch my live shows on Twitch ➡️ https://twitch.tv/gmhikaru
Play chess on Chess.com ➡️ https://www.chess.com/?ref_id=15448422
Support/Tip/Donate to the channel ➡️ https://streamelements.com/gmhikaru/tip
Join our Discord ➡️ https://discord.gg/b5CUjej to stay in contact and join our community
Become a fan on Facebook ➡️ https://facebook.com/GMHikaru
Follow me on Twitter ➡️ https://twitter.com/GMHikaru
Find me on Chess.com ➡️ https://www.chess.com/member/hikaru

but
Video description from 'youtube-dl -v --write-description -- X65xLj4fqmM'
returns .description file is:

Our first in a series of clip compilations from twitch.tv/gmhikaru Watch my live shows on Twitch ➡️ https://twitch.tv/gmhikaru Play chess on Chess.com ➡️ htt...

Context is previously
Youtube.com could download full descriptions.
But just now (2020-07-14 09h27m50s) I noticed ~160 character abbreviated *.description files.

So
Verdict is
Youtube.com could be using a new website interface, which dynamically removes and adds raw text contents, like twitter (like which removes working of Save Page WE on twitter).

Solution could be
youtube-dl clicks Expand description button