[Patreon] Youtube embedded videos fail to be correctly detected, downloads wrong video

[Fironet]

• I've verified and I assure that I'm running youtube-dl 2017.10.15.1
• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)

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[debug] System config: []
[debug] User config: ['-o', 'N:\\Videos\\%(title)s [%(uploader)s, %(extractor)s].%(ext)s', '--console-title', '--no-mtim
e']
[debug] Custom config: []
[debug] Command-line args: ['https://www.patreon.com/posts/cnc-plasma-and-8590334', '-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2017.10.15.1
[debug] Python version 3.4.4 - Windows-8.1-6.3.9600
[debug] exe versions: ffmpeg N-81592-g2793ebd, ffprobe N-81592-g2793ebd, rtmpdump 2.4
[debug] Proxy map: {}
[generic] cnc-plasma-and-8590334: Requesting header
WARNING: Falling back on generic information extractor.
[generic] cnc-plasma-and-8590334: Downloading webpage
[generic] cnc-plasma-and-8590334: Extracting information
[youtube] LWH5bfpivSU: Downloading webpage
[youtube] LWH5bfpivSU: Downloading video info webpage
[youtube] LWH5bfpivSU: Extracting video information
[youtube] LWH5bfpivSU: Downloading MPD manifest
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on 'https://r2---sn-8vq54vox50-hxal.googlevideo.com/videoplayback?id=2d61f96dfa62bd25&itag=1
37&source=youtube&requiressl=yes&pl=19&ms=au&initcwndbps=1350000&mv=m&mn=sn-8vq54vox50-hxal&mm=31&ei=BmPjWeLAHIuk4QKG_5u
QCw&ratebypass=yes&mime=video/mp4&gir=yes&clen=754464812&lmt=1507903998720905&dur=1634.166&key=dg_yt0&signature=51C6138E
55151B61A5860AE07EB30917CC7CB9B0.0626F1623901E654249EA1F50F905F155CA691FE&mt=1508074146&ip=xx.xx.xxx.xxx&ipbits=0&expir
e=1508095846&sparams=ip,ipbits,expire,id,itag,source,requiressl,pl,ms,initcwndbps,mv,mn,mm,ei,ratebypass,mime,gir,clen,l
mt,dur'
[download] Destination: N:\Videos\Bored of lame tool reviews Meet DeWalt's 12 Amp Grinder part A [AvE, youtube].f137.mp4

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Description of your issue, suggested solution and other information

Downloading Youtube videos from Patreon pages using youtube-dl fails to detect the correct video. Take this video post for example (seen in the above verbose output), rather than download the video seen on the page it downloads an unrelated video from the channel—and that same video is downloaded regardless of which video post is input to youtube-dl from that Patreon channel.