Anything is wrong with this thing

[UnixCro]

.../com.termux/files $ youtube-dl -F

 https://youtube.com/playlist?list=PLBDCB2D1BE540D2C6 -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-F', 'https://youtube.com/playlist?list=PLBDCB2D1BE540D2C6', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2021.06.06
[debug] Python version 3.10.1 (CPython) - Linux-4.14.87+-armv8l-with-libc
[debug] exe versions: ffmpeg 4.4.1, ffprobe 4.4.1
[debug] Proxy map: {}
[youtube:tab] PLBDCB2D1BE540D2C6: Downloading webpage
[download] Downloading playlist: Eigene Songs
[youtube:tab] playlist Eigene Songs: Downloading 34 videos
[download] Downloading video 1 of 34
[youtube] XY36aNE4y1g: Downloading webpage
[youtube] XY36aNE4y1g: Downloading player 204bfffb
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1348, in _decrypt_signature
    func = self._extract_signature_function(
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1331, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
youtube_dl.utils.ExtractorError: Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.")); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1348, in _decrypt_signature
    func = self._extract_signature_function(
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1331, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
youtube_dl.utils.ExtractorError: Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1348, in _decrypt_signature
    func = self._extract_signature_function(
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1331, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
youtube_dl.utils.ExtractorError: Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/YoutubeDL.py", line 815, in wrapper
    return func(self, *args, **kwargs)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/YoutubeDL.py", line 836, in __extract_info
    ie_result = ie.extract(url)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/common.py", line 534, in extract
    ie_result = self._real_extract(url)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1623, in _real_extract
    signature = self._decrypt_signature(sc['s'][0], video_id, player_url)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1358, in _decrypt_signature
    raise ExtractorError(
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1348, in _decrypt_signature
    func = self._extract_signature_function(
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/extractor/youtube.py", line 1331, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/data/data/com.termux/files/usr/lib/python3.10/site-packages/youtube_dl/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
youtube_dl.utils.ExtractorError: Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Could not find JS function 'na'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.")); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[dirkf]

Duplicate of #30363, with fix.