说起来最近 youtube-dl a,b 俩站都不能解析了，是我一个人的问题么？
Playing:
http://www.bilibili.com/video/av4987511/[ytdl_hook] Traceback (most recent call last):
[ytdl_hook] File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/
runpy.py", line 162, in _run_module_as_main
[ytdl_hook] "__main__", fname, loader, pkg_name)
[ytdl_hook] File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/
runpy.py", line 72, in _run_code
[ytdl_hook] exec code in run_globals
[ytdl_hook] File "/usr/local/bin/youtube-dl/
__main__.py", line 19, in <module>
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
__init__.py", line 421, in main
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
__init__.py", line 411, in _real_main
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
YoutubeDL.py", line 1736, in download
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
YoutubeDL.py", line 676, in extract_info
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/extractor/
common.py", line 341, in extract
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/extractor/
bilibili.py", line 62, in _real_extract
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/extractor/
common.py", line 524, in _download_xml
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
compat.py", line 280, in compat_etree_fromstring
[ytdl_hook] File "/usr/local/bin/youtube-dl/youtube_dl/
compat.py", line 269, in _XML
[ytdl_hook] File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/
ElementTree.py", line 1642, in feed
[ytdl_hook] self._raiseerror(v)
[ytdl_hook] File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/
ElementTree.py", line 1506, in _raiseerror
[ytdl_hook] raise err
[ytdl_hook] xml.etree.ElementTree.ParseError: not well-formed (invalid token): line 1, column 0
[ytdl_hook] youtube-dl failed, trying to play URL directly ...
Failed to recognize file format.