[PornHub] Add support for channel videos

[parmjitv]

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• 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

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.02.11. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.02.11

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• 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

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$ youtube-dl -v 'https://www.pornhub.com/channels/erflix/videos?o=ra'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.pornhub.com/channels/erflix/videos?o=ra']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.02.11
[debug] Python version 2.7.9 (CPython) - Linux-3.16.0-4-686-pae-i686-with-debian-8.7
[debug] exe versions: ffmpeg 3.2.4-1, ffprobe 3.2.4-1
[debug] Proxy map: {}
[generic] videos?o=ra: Requesting header
WARNING: Falling back on generic information extractor.
[generic] videos?o=ra: Downloading webpage
[generic] videos?o=ra: Extracting information
[download] Downloading playlist: Erflix Porn Videos & HD Scene Trailers | Pornhub
[generic] playlist Erflix Porn Videos & HD Scene Trailers | Pornhub: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on u'data:"+o+";base64,"+E+"'
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, 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 "/usr/local/bin/youtube-dl/main.py", line 19, in
File "/usr/local/bin/youtube-dl/youtube_dl/init.py", line 471, in main
File "/usr/local/bin/youtube-dl/youtube_dl/init.py", line 461, in _real_main
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1989, in download
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 995, in process_ie_result
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 850, in process_ie_result
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1623, in process_video_result
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1896, in process_info
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1835, in dl
File "/usr/local/bin/youtube-dl/youtube_dl/downloader/common.py", line 364, in download
File "/usr/local/bin/youtube-dl/youtube_dl/downloader/http.py", line 340, in real_download
File "/usr/local/bin/youtube-dl/youtube_dl/downloader/http.py", line 109, in establish_connection
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2199, in urlopen
File "/usr/lib/python2.7/urllib2.py", line 431, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 449, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2476, in data_open
binascii.Error: Incorrect padding

Pornhub.com features a number of free channels that feature themed video content, such as:

https://www.pornhub.com/channels/brutalcatfight
https://www.pornhub.com/channels/scandinaviaexposed
And my personal favorite:
https://www.pornhub.com/channels/braziliantranssexuals

The videos featured on the channel pages can be sorted as Top Rated, Most Recent and Most Viewed. It would be nice to be able to download these collections as playlists.

Cheers,

Parmjit V.