Fetch and download video list according challenge and user from Tik Tok
$ git clone https://github.com/usunyu/tiktok-crawler
$ cd tiktok-crawler
$ sudo python setup.py install
$ tiktok-crawler http://v.douyin.com/8YVQBV/ all 200
$ tiktok-crawler http://v.douyin.com/82UayF/ latest 20