[youtube]fix for token not in video infor

[FindHao]

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• Bug fix
• Improvement
• New extractor
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Description of your pull request and other information

There is an urgent change of youtube that they change token parameter to account_playback_token, so youtube-dl can not parse the result correctly. There are some issues about this problem
Fixes #20761 #20764 #20766 #20767 #20768 #20769

[ctubbsii]

This fixed the bug for me.

[bugfood]

Thanks for this. I get the following error:

$ make
mkdir -p zip
for d in youtube_dl youtube_dl/downloader youtube_dl/extractor youtube_dl/postprocessor ; do \
  mkdir -p zip/$d ;\
  cp -pPR $d/*.py zip/$d/ ;\
done
touch -t 200001010101 zip/youtube_dl/*.py zip/youtube_dl/*/*.py
mv zip/youtube_dl/__main__.py zip/
cd zip ; zip -q ../youtube-dl youtube_dl/*.py youtube_dl/*/*.py __main__.py
rm -rf zip
echo '#!/usr/bin/env python' > youtube-dl
cat youtube-dl.zip >> youtube-dl
rm youtube-dl.zip
chmod a+x youtube-dl
COLUMNS=80 /usr/bin/env python youtube_dl/__main__.py --help | /usr/bin/env python devscripts/make_readme.py
Traceback (most recent call last):
  File "youtube_dl/__main__.py", line 16, in <module>
    import youtube_dl
  File "/usr/local/src/youtube-dl/youtube_dl/__init__.py", line 43, in <module>
    from .extractor import gen_extractors, list_extractors
  File "/usr/local/src/youtube-dl/youtube_dl/extractor/__init__.py", line 9, in <module>
    from .extractors import *
  File "/usr/local/src/youtube-dl/youtube_dl/extractor/extractors.py", line 8, in <module>
    from .abcnews import (
  File "/usr/local/src/youtube-dl/youtube_dl/extractor/abcnews.py", line 10, in <module>
    from .youtube import YoutubeIE
  File "/usr/local/src/youtube-dl/youtube_dl/extractor/youtube.py", line 1682
    video_info['token'] = video_info['account_playback_token']
             ^
IndentationError: expected an indented block
Traceback (most recent call last):
  File "devscripts/make_readme.py", line 19, in <module>
    options = helptext[helptext.index('  General Options:') + 19:]
ValueError: substring not found
make: *** [Makefile:76: README.md] Error 1

When I indent the line by an additional four spaces, it works fine. Thanks again.

-Corey

[FindHao]

@bugfood Sorry for the mistake. I have update the code to add the indents.