Repository: youtube-dl
Issue: [Nico Nico Douga] "Unable to find video URL" error when downloading videos above 100MB
Labels: account-needed

- [x] I've **verified** and **I assure** that I'm running youtube-dl **2016.08.24.1**
- [x] At least skimmed through [README](https://github.com/rg3/youtube-dl/blob/master/README.md) and **most notably** [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
- [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones

---

edit: error still present in 2016.09.19 update (another crashing example: http://www.nicovideo.jp/watch/sm29698977)

You might be aware that Nico Nico Douga raised its upload limit to 1.5GB instead of what formerly was 100MB after August 18th 2016. Some users already began uploading content above 100MB, and this apparently causes some trouble to our well known "video downloaders".

Now when trying to attempt to download such content with youtube-dl, I'm rewarded by a strange and irrelevant "Unable to find video URL" when it actually tries to retrieve data and gather video info. And yes, I'm using the latest version to date and am actually using my login credentials to download the video. For the moment, only VideoDownloadHelper (Firefox add-on) manages to download this particular video (featured in the log) but it unfortunately fails before the end.
- Here's one of the incriminating videos: http://www.nicovideo.jp/watch/sm29513760
- Here's my log (user and password replaced by ***):

```
F:\>youtube-dl -v -u *** -p *** http://www.nicovideo.jp/watch/sm29513760
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', '-u', 'PRIVATE', '-p', 'PRIVATE', 'http://www.nicovideo.jp/watch/sm29513760']
[debug] Encodings: locale cp1252, fs mbcs, out cp1252, pref cp1252
[debug] youtube-dl version 2016.08.24.1
[debug] Python version 3.4.4 - Windows-XP-5.1.2600-SP3
[debug] exe versions: ffmpeg 2.8.4, ffprobe N-67999-gd0879a9
[debug] Proxy map: {}
ERROR: Unable to find video URL; please report this issue on https://yt-dl.org/
ug . Make sure you are using the latest version; type  youtube-dl -U  to update
 Be sure to call youtube-dl with the --verbose flag and include its complete ou
put.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvarrvgfb\bild\youtube_dl\YoutubeDL.py", line 691, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvarrvgfb\bild\youtube_dl\extractor\common.py", line 347, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvarrvgfb\bild\youtube_dl\extractor\niconico.py", line 161, in _real_extract
youtube_dl.utils.ExtractorError: Unable to find video URL; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
```
- Another log (from a different environment, Ubuntu 16.04):

```
$ youtube-dl -v -u *** -p *** http://www.nicovideo.jp/watch/sm29513760
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'-u', u'PRIVATE', u'-p', u'PRIVATE', u'http://www.nicovideo.jp/watch/sm29513760']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.08.24.1
[debug] Python version 2.7.12 - Linux-4.4.0-34-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: avconv 2.8.6-1ubuntu2, avprobe 2.8.6-1ubuntu2, ffmpeg 2.8.6-1ubuntu2, ffprobe 2.8.6-1ubuntu2, rtmpdump 2.4
[debug] Proxy map: {}
[niconico] Logging in
[niconico] sm29513760: Downloading webpage
[niconico] sm29513760: Downloading video info page
[niconico] sm29513760: Downloading flv info
ERROR: Unable to find video URL; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 691, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 347, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/niconico.py", line 161, in _real_extract
    raise ExtractorError('Unable to find video URL')
ExtractorError: Unable to find video URL; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
```