Empty folder created no video download

[lhkjacky]

It create a empty folder with user_id but no video is downloaded.

[MingBi]

我也有同样的问题，用户的下不出来视频。我用挑战去下，绝大部分都是0kb的文件，只有几个能下载出来

[hahaha108]

The signature algorithm failed, and the constructed link required many requests to get the data