ffmpeg_downloader.installed doesn't check if ffmpeg is installed anywhere else on the system.

[FlorianEagox]

The ffmpeg_downloader.installed() function only seems to check if ffmpeg is installed in the dir this program would install it in, but it doesn't check if it's already in the system path or callable globally from the CLI.

[tikuma-lsuhsc]

Right. Because this project was meant to be a cli command, I figured the user would/should first try ffmpeg command before ffdl to see if the system already has FFmpeg installed. Let me sit on it for a bit.