Lego.com video downloading not working

[rayclwu]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.01.01
• 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 (original)

$ ./youtube-dl -v https://www.lego.com/en-us/kids/videos/ninjago/tvcomninjagovideoepisode-20-the-stone-army-ec27326a837c48198f415f7c5bd7fc89
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.lego.com/en-us/kids/videos/ninjago/tvcomninjagovideoepisode-20-the-stone-army-ec27326a837c48198f415f7c5bd7fc89']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.01.01
[debug] Python version 2.7.12 (CPython) - Linux-4.4.59+-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 2.7.1
[debug] Proxy map: {}
[LEGO] ec27326a837c48198f415f7c5bd7fc89: Downloading webpage
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "./youtube-dl/__main__.py", line 19, in <module>
  File "./youtube-dl/youtube_dl/__init__.py", line 474, in main
  File "./youtube-dl/youtube_dl/__init__.py", line 464, in _real_main
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 2018, in download
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
  File "./youtube-dl/youtube_dl/extractor/common.py", line 530, in extract
  File "./youtube-dl/youtube_dl/extractor/lego.py", line 54, in _real_extract
AttributeError: 'NoneType' object has no attribute 'strip'

Verbose log (After fixing title retrieval)

$ python -m youtube_dl -v https://www.lego.com/en-us/kids/videos/ninjago/tvcomninjagovideoepisode-20-the-stone-army-ec27326a837c48198f415f7c5bd7fc89
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.lego.com/en-us/kids/videos/ninjago/tvcomninjagovideoepisode-20-the-stone-army-ec27326a837c48198f415f7c5bd7fc89']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.01.01
[debug] Git HEAD: 483b858d4
[debug] Python version 3.7.2 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[LEGO] ec27326a837c48198f415f7c5bd7fc89: Downloading webpage
WARNING: unable to extract contentUrl; 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 "/anaconda3/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/anaconda3/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/__main__.py", line 19, in <module>
    youtube_dl.main()
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/__init__.py", line 474, in main
    _real_main(argv)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/__init__.py", line 464, in _real_main
    retcode = ydl.download(all_urls)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/YoutubeDL.py", line 2018, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/extractor/lego.py", line 60, in _real_extract
    content_url, 'video path', default=None)
  File "/Users/jlwu/Desktop/youtube-dl-src/youtube_dl/extractor/common.py", line 984, in _search_regex
    mobj = re.search(pattern, string, flags)
  File "/anaconda3/lib/python3.7/re.py", line 183, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or bytes-like object

Description

Lego.com had been changed. All url in test cases no longer work (404)

The above error: AttributeError: 'NoneType' object has no attribute 'strip' is from title retrieval. It may be fixable by changing to title = self._html_search_meta('description', webpage)

However, after fixing title retrieval, it still failed (see 2nd log above)

It looks like lego.com had changed how it play video to the following:
<video class="vjs-tech" id="vjs_video_3_html5_api" tabindex="-1" autoplay="" src="blob:https://www.lego.com/f4cf2444-028c-c444-8e8a-05a9cdf9a9ee"></video>