Can download a video and save the audio to a mp3 file, edit its metadata when available on your local disk. For example, used conjointly with the google play music daemon on that specific folder enables the user to upload the said music file on google play. Furthermore, the phone application enables the user to download any changes or new files being pushed on your account. So in one click, you can download the audio of a youtube video on your cell phone.
NOTE: You need to replace the value of YOUTUBE_DL_EXT_HOST_PATH ("MY_PATH") with the output folder that you want to use on your system.