Closes#10464
According to a screenshot in http://tieba.baidu.com/p/4691302183,
thvideo.tv is shut down "temporarily". I see no clues that it will be up
again, so I remove it here.
Closes#10363
In the original mtvservices:embedded test case, config.xml is still used
to get the feed URL. Some other examples, including test_Generic_40
(http://www.vulture.com/2016/06/new-key-peele-sketches-released.html),
and the video mentioned in #10363, use another endpoint to get the feed
URL. The 'index.html' approach works for the original test case, too. So
I didn't keep the old approach.