A. you-get -i d:\you https://www.bilibili.com/video/av679281996/simple

B. you-get -o d:\you https://www.bilibili.com/video/av679281996

C. you-get d:\you https://www.bilibili.com/video/av679281996/simple

D. you-get -o d:\you -i https://www.bilibili.com/video/av679281996