Old YouTube trick on URL breaks youtube-dl

[AdamDanischewski]

I know I can download the channel of a user, using the following:
youtube-dl -v ytuser:filmisnow

Yet there is a trick to turn any video into a playlist of all the videos of the corresponding user channel by adding to the video URL: &feature=mfu_in_order&list=UL

But youtube-dl breaks:
E.g. https://www.youtube.com/watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL

youtube-dl -vvv "https://www.youtube.com/watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-vvv', u'https://www.youtube.com/watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.08.01
[debug] Python version 2.7.6 - Linux-3.8.11-x86_64-with-Ubuntu-14.04-trusty
[debug] exe versions: avconv 9.18-6, avprobe 9.18-6
[debug] Proxy map: {}
[generic] watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL: Requesting header
WARNING: Falling back on generic information extractor.
[generic] watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL: Downloading webpage
[generic] watch?v=Ih7FpwDWRuQ&feature=mfu_in_order&list=UL: Extracting information
WARNING: Your copy of avconv is outdated and unable to properly mux separate video and audio files, youtube-dl will download single file media. Update avconv to version 10-0 or newer to fix this.
[debug] Invoking downloader on u'https://www.youtube.com/annotations_invideo?cap_hist=1\\u0026playlist_id=UL\\u0026video_id=Ih7FpwDWRuQ\\u0026ei=A67YV4vSDOLd8gTHzqTwBA'
ERROR: unable to download video data: HTTP Error 400: Bad Request
Traceback (most recent call last):
File "/home/cronkilla/REMEDY_DEV/scripts/youtube-dl/youtube_dl/YoutubeDL.py", line 1683, in process_info
success = dl(filename, info_dict)
File "/home/cronkilla/REMEDY_DEV/scripts/youtube-dl/youtube_dl/YoutubeDL.py", line 1625, in dl
return fd.download(name, info)
File "/home/cronkilla/REMEDY_DEV/scripts/youtube-dl/youtube_dl/downloader/common.py", line 350, in download
return self.real_download(filename, info_dict)
File "/home/cronkilla/REMEDY_DEV/scripts/youtube-dl/youtube_dl/downloader/http.py", line 58, in real_download
data = self.ydl.urlopen(request)
File "/home/cronkilla/REMEDY_DEV/scripts/youtube-dl/youtube_dl/YoutubeDL.py", line 1985, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "/usr/lib/python2.7/urllib2.py", line 410, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 448, in error
return self._call_chain(_args)
File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
result = func(_args)
File "/usr/lib/python2.7/urllib2.py", line 531, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 400: Bad Request

It would be nice if this were supported, since its convenient to not have to detect the username/channel id to get the entire channel corresponding to a video.