Egghead still broken

[Miosame]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2021.03.03
• 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

Verbose log

$ youtube-dl -v "https://egghead.io/courses/write-your-first-program-with-the-rust-language"

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://egghead.io/courses/write-your-first-program-with-the-rust-language']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2021.03.03
[debug] Python version 3.8.5 (CPython) - Linux-5.4.0-66-generic-x86_64-with-glibc2.29
[debug] exe versions: ffmpeg 4.2.4, ffprobe 4.2.4
[debug] Proxy map: {}
[egghead:course] write-your-first-program-with-the-rust-language: Downloading course lessons JSON
[egghead:course] write-your-first-program-with-the-rust-language: Downloading course JSON
[download] Downloading playlist: Write Your First Program with the Rust Language
[egghead:course] playlist Write Your First Program with the Rust Language: Collected 15 video ids (downloading 15 of them)
[download] Downloading video 1 of 15
ERROR: no suitable InfoExtractor for URL https://app.egghead.io/lessons/rust-install-rust
  File "/home/user/.local/bin/youtube-dl", line 8, in <module>
    sys.exit(main())
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/__init__.py", line 475, in main
    _real_main(argv)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/__init__.py", line 465, in _real_main
    retcode = ydl.download(all_urls)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 2055, in download
    res = self.extract_info(
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 799, in extract_info
    return self.__extract_info(url, ie, download, extra_info, process)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 806, in wrapper
    return func(self, *args, **kwargs)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 838, in __extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 924, in process_ie_result
    return self.__process_playlist(ie_result, download)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 1058, in __process_playlist
    entry_result = self.__process_iterable_entry(entry, download, extra)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 806, in wrapper
    return func(self, *args, **kwargs)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 1067, in __process_iterable_entry
    return self.process_ie_result(
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 876, in process_ie_result
    return self.extract_info(ie_result['url'],
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 801, in extract_info
    self.report_error('no suitable InfoExtractor for URL %s' % url)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 628, in report_error
    self.trouble(error_message, tb)
  File "/home/user/.local/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 590, in trouble
    tb_data = traceback.format_list(traceback.extract_stack())

Description

#28038 fixed the URL, but I assume somewhere it's still not changed to the new URL.