[teamcoco] fix and improve extraction

[gfabiano]

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Fix extraction, KeyError exception. ( closes #17099 )

[jmraker]

The site changed again and this unreleased fix is broken. Now the video urls are in a json response from http://teamcoco.com/_truman/d/104328 where the 104328 number is a video id that is/was probably parsed.

{"meta":{"useFreewheel":false,"freewheelId":"tbs-node-104328","turnerMediaId":null,"turnerMediaAuthToken":"","duration":"0:02:25","poster":{"url":"http://cdn.teamcococdn.com/image/640x360,frame:1/1189-comedy-5-5b53f952bc599.png"},"src":{"hd":{"label":"hd","src":"https://ak-storage-west.teamcococdn.com/cdn/2018-07/104328/bca7/CONAN_072218_Comedy_5-high.mp4","type":"video/mp4"},"sd":{"label":"sd","src":"https://ak-storage-west.teamcococdn.com/cdn/2018-07/104328/bca7/CONAN_072218_Comedy_5-standard.mp4","type":"video/mp4"},"hls":{"label":"hls","src":"https://ak-storage-west.teamcococdn.com/cdn/2018-07/104328/bca7/main.m3u8","type":"application/x-mpegurl"},"uhd":{"label":"uhd","src":"https://ak-storage-west.teamcococdn.com/cdn/2018-07/104328/bca7/CONAN_072218_Comedy_5-1080-6mb.mp4","type":"video/mp4"},"low":{"label":"low","src":"https://ak-storage-west.teamcococdn.com/cdn/2018-07/104328/bca7/CONAN_072218_Comedy_5-500k.mp4","type":"video/mp4"}}}}

[jmraker]

Actually the url is http://teamcoco.com/_truman/d/104328?v=v1536871782669

For the ?v=v1536871782669, it'll return the same json without that parameter (I was trying the url without it when I replied). It's probably from http://teamcoco.com/_truman/f/clips-v1536871782669.html where the http://teamcoco.com/_truman/d/104328 is assembled from concatenated constants there. Not sure where v1536871782669 comes from, perhaps it's the result of some javascript equation