[feature request] [xvideos] download user profiles

[master-leonardo]

Checklist

• I'm reporting a site feature request
• I've verified that I'm running youtube-dl version 2019.07.16
• I've searched the bugtracker for similar site feature requests including closed ones

Description

Right now we can only download single xvideos videos, i'd like to suggest to be able to download full profiles.

Example URLs

• Profile: https://www.xvideos.com/profiles/USERNAME#
  https://www.xvideos.com/channels/USERNAME
• https://www.xvideos.com/amateur-channels/USERNAME#
• https://www.xvideos.com/pornstar-channels/USERNAME#
• Vigeos Page: https://www.xvideos.com/profiles/USERNAME#_tabVideos
  https://www.xvideos.com/amateur-channels/USERNAME#_tabVideos
  https://www.xvideos.com/pornstar-channels/USERNAME#_tabVideos
• Single Video: https://www.xvideos.com/videoID/VIDEONAME (already supported)
  But if we navigate through the videos pages, it's like this:
• https://www.xvideos.com/profiles/USERNAME#0 = page 1
• https://www.xvideos.com/amateur-channels/USERNAME#0 = page 1
• https://www.xvideos.com/pornstar-channels/USERNAME#2 = page 3
• https://www.xvideos.com/profiles/USERNAME#7 = page 8
  ...
• https://www.xvideos.com/profiles/USERNAME#10 = page 11
  even though the address bar does not change it's url.

Here is an example with a user with plenty of pages on their profiles
https://www.xvideos.com/pornstar-channels/mia-khalifa#_tabVideos

youtube-dl -v https://www.xvideos.com/profiles/fehelarissa
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.xvideos.com/profiles/fehelarissa'
]
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2019.07.16
[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-93300-g96451477b9, ffprobe N-93300-g96451477b9, p
hantomjs 2.1.1
[debug] Proxy map: {}
[generic] fehelarissa: Requesting header
WARNING: Falling back on generic information extractor.
[generic] fehelarissa: Downloading webpage
[generic] fehelarissa: Extracting information
ERROR: Unsupported URL: https://www.xvideos.com/profiles/fehelarissa
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpaxmfe_
l6\build\youtube_dl\YoutubeDL.py", line 796, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpaxmfe_
l6\build\youtube_dl\extractor\common.py", line 530, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpaxmfe_
l6\build\youtube_dl\extractor\generic.py", line 3333, in _real_extract
youtube_dl.utils.UnsupportedError: Unsupported URL: https://www.xvideos.com/prof
iles/fehelarissa