Liveleak videos are falling back to generic extractor

[royale1223]

Liveleak videos are falling back to generic extractor in 2018.03.20. Here's the output:

$ ./youtube-dl -v -F https://www.liveleak.com/view?t=HvHi_1523016227
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'-F', u'https://www.liveleak.com/view?t=HvHi_1523016227']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.03.20
[debug] Lazy loading extractors enabled
[debug] Python version 2.7.14 (CPython) - Linux-4.13.0-37-generic-x86_64-with-Ubuntu-17.10-artful
[debug] exe versions: ffmpeg 3.3.4-2, ffprobe 3.3.4-2
[debug] Proxy map: {}
[generic] view?t=HvHi_1523016227: Requesting header
WARNING: Falling back on generic information extractor.
[generic] view?t=HvHi_1523016227: Downloading webpage
[generic] view?t=HvHi_1523016227: Extracting information
[download] Downloading playlist: Liveleak.com - WTF
[generic] playlist Liveleak.com - WTF: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[info] Available formats for view?t=HvHi_1523016227:
format code  extension  resolution note
360p         mp4        unknown    
[download] Finished downloading playlist: Liveleak.com - WTF