Make sure you have the last version for youtube-dl
sudo youtube-dl -U
after that you can solve this problem by installing the missing ffmpeg on ubuntu and debian:
sudo apt-get install ffmpeg
and macOS use the command:
brew install ffmpeg
Make sure you have the last version for youtube-dl
sudo youtube-dl -U
after that you can solve this problem by installing the missing ffmpeg on ubuntu and debian:
sudo apt-get install ffmpeg
and macOS use the command:
brew install ffmpeg