[YT] --username results in WARNING: Unable to look up account info: HTTP Error 400: Bad Request

Checklist

• I’m reporting a broken site support issue
• I’ve verified that I’m running youtube-dlc version 2020.10.31
• 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 bug reports including closed ones
• I’ve read bugs section in FAQ

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '--username', 'PRIVATE', 'https://www.youtube.com/watch?v=g3iC3SgsZO0']
Type account password and press [Return]:
[debug] Loading archive file None
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dlc version 2020.11.11-2
[debug] Git HEAD: 228385340
[debug] Python version 3.8.6 (CPython) - Linux-5.7.0-3-amd64-x86_64-with-glibc2.29
[debug] exe versions: ffmpeg 4.3.1, ffprobe 4.3.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] Downloading login page
[youtube] Looking up account info
WARNING: Unable to look up account info: HTTP Error 400: Bad Request
[youtube] g3iC3SgsZO0: Downloading webpage
[youtube] {18} signature length 105, html5 player 8b85eac2
[youtube] {134} signature length 101, html5 player 8b85eac2
[youtube] {243} signature length 105, html5 player 8b85eac2
[youtube] {133} signature length 101, html5 player 8b85eac2
[youtube] {242} signature length 105, html5 player 8b85eac2
[youtube] {160} signature length 105, html5 player 8b85eac2
[youtube] {278} signature length 105, html5 player 8b85eac2
[youtube] {140} signature length 105, html5 player 8b85eac2
[youtube] {249} signature length 105, html5 player 8b85eac2
[youtube] {250} signature length 105, html5 player 8b85eac2
[youtube] {251} signature length 105, html5 player 8b85eac2
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] Rainbow Bunchie song-g3iC3SgsZO0.mkv has already been downloaded and merged

Description

For a long time now logging into YouTube with --username has been broken it would be nice to see this fixed. On the standard youtube-dl this was an ignored issue that no one seemed to care about.

[ghost]

thanks works.

[pukkandan]

Use the --cookies option, for example --cookies /path/to/cookies/file.txt.

In order to extract cookies from browser use any conforming browser extension for exporting cookies. For example, Get cookies.txt (for Chrome) or cookies.txt (for Firefox).

https://github.com/ytdl-org/youtube-dl#how-do-i-pass-cookies-to-youtube-dl