Introduction This folder is mainly about downloading video. More Reference DOcument http://mp.weixin.qq.com/s?__biz=MzU3MzQxMjE2NA==&mid=100003486&idx=1&sn=e631fcbb34226ba4fe7e162f6599552e&chksm=7cc348b54bb4c1a3edd2224e6a5f76fb4cbe6f32039cd53a85ce42014387e3f4bfb0e06d2e6a#rd