Repository: youtube-dl
Issue: [pbs] Support shows
Labels: site-support-request

## Please follow the guide below

- You will be asked some questions and requested to provide some information, please read them **carefully** and answer honestly
- Put an `x` into all the boxes [ ] relevant to your *issue* (like this: `[x]`)
- Use the *Preview* tab to see what your issue will actually look like

---

### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2017.11.15*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
- [x ] I've **verified** and **I assure** that I'm running youtube-dl **2017.11.15**

### Before submitting an *issue* make sure you have:
- [x ] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [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

### What is the purpose of your *issue*?
- [ x] Bug report (encountered problems with youtube-dl)
- [ ] Site support request (request for adding support for a new site)
- [ ] Feature request (request for a new functionality)
- [ ] Question
- [ ] Other

---

### The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your *issue*

---

Youtube-dl claims to be unable to download a web page.

Note that I checked both the show page, and since it was a javascript page, I went into the episode listing page as well.

NB: Today is the first time I've tried to get anything from PBS. So far, I am 0 for 1.

```
keybounceMBP:PBS michael$ youtube-dl --get-filename http://www.pbs.org/show/nature/
WARNING: Unable to download webpage: HTTP Error 404: Not Found
WARNING: Unable to download webpage: HTTP Error 404: Not Found
ERROR: No video formats found; 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.
keybounceMBP:PBS michael$ youtube-dl -v --get-filename http://www.pbs.org/show/nature/
[debug] System config: []
[debug] User config: ['-k', '--hls-prefer-native', '--abort-on-unavailable-fragment', '-o', '%(series)s/s%(season_number)02d-e%(episode_number)02d-%(title)s.%(ext)s', '-f', '\nbest[ext=mp4][height>431][height<=576]/\nbestvideo[ext=mp4][height=480]+bestaudio[ext=m4a]/\nbest[ext=mp4][height>340][height<=431]/\nbestvideo[ext=mp4][height>360][height<=576]+bestaudio/\nbest[height>340][height<=576]/\nbestvideo[height>360][height<=576]+bestaudio/\nbestvideo[height=360]+bestaudio/\nbest[ext=mp4][height>=280][height<=360]/\nbest[height<=576]/\nworst', '--ap-mso', 'Dish', '--ap-username', 'PRIVATE', '--ap-password', 'PRIVATE', '--write-sub', '--write-auto-sub', '--sub-lang', 'en,enUS,en-us', '--sub-format', 'ass/srt/best', '--convert-subs', 'ass', '--embed-subs', '--mark-watched', '--download-archive', 'downloaded-videos.txt']
[debug] Custom config: []
[debug] Command-line args: ['-v', '--get-filename', 'http://www.pbs.org/show/nature/']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.11.15
[debug] Python version 3.6.3 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.3.4, ffprobe 3.3.4, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: Unable to download webpage: HTTP Error 404: Not Found
WARNING: Unable to download webpage: HTTP Error 404: Not Found
ERROR: No video formats found; 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 "/Users/michael/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 437, in extract
    ie_result = self._real_extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/pbs.py", line 589, in _real_extract
    self._sort_formats(formats)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 1075, in _sort_formats
    raise ExtractorError('No video formats found')
youtube_dl.utils.ExtractorError: No video formats found; 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.

keybounceMBP:PBS michael$ youtube-dl -v --get-filename http://www.pbs.org/show/nature/episodes/
[debug] System config: []
[debug] User config: ['-k', '--hls-prefer-native', '--abort-on-unavailable-fragment', '-o', '%(series)s/s%(season_number)02d-e%(episode_number)02d-%(title)s.%(ext)s', '-f', '\nbest[ext=mp4][height>431][height<=576]/\nbestvideo[ext=mp4][height=480]+bestaudio[ext=m4a]/\nbest[ext=mp4][height>340][height<=431]/\nbestvideo[ext=mp4][height>360][height<=576]+bestaudio/\nbest[height>340][height<=576]/\nbestvideo[height>360][height<=576]+bestaudio/\nbestvideo[height=360]+bestaudio/\nbest[ext=mp4][height>=280][height<=360]/\nbest[height<=576]/\nworst', '--ap-mso', 'Dish', '--ap-username', 'PRIVATE', '--ap-password', 'PRIVATE', '--write-sub', '--write-auto-sub', '--sub-lang', 'en,enUS,en-us', '--sub-format', 'ass/srt/best', '--convert-subs', 'ass', '--embed-subs', '--mark-watched', '--download-archive', 'downloaded-videos.txt']
[debug] Custom config: []
[debug] Command-line args: ['-v', '--get-filename', 'http://www.pbs.org/show/nature/episodes/']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.11.15
[debug] Python version 3.6.3 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.3.4, ffprobe 3.3.4, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: Unable to download webpage: HTTP Error 404: Not Found
WARNING: Unable to download webpage: HTTP Error 404: Not Found
ERROR: No video formats found; 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 "/Users/michael/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 437, in extract
    ie_result = self._real_extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/pbs.py", line 589, in _real_extract
    self._sort_formats(formats)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 1075, in _sort_formats
    raise ExtractorError('No video formats found')
youtube_dl.utils.ExtractorError: No video formats found; 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.

keybounceMBP:PBS michael$ 
```