youtube-dl Download Youtube Video
## What you need
1. youtube-dl
2. aria2
3. Proxy(if you live in Country like China)
## Run this in command line
export http_proxy=http://127.0.0.1:1087;export https_proxy=http://127.0.0.1:1087;
youtube-dl --external-downloader aria2c --external-downloader-args "-x 16 -k 1M" https://www.youtube.com/watch?v=rAeN7TdGq4o