From the docs - it gives you control: > If the filename argument is omitted then (after asking for confirmation) the resulting asciicast is uploaded to asciine

From the docs - it gives you control: > If the filename argument is omitted then (after asking for confirmation) the resulting asciicast is uploaded to asciinema-server (by default to asciinema.org), where it can be watched and shared. If the filename argument is given then the resulting recording (called asciicast) is saved to a local file. It can later be replayed with asciinema play <filename> and/or uploaded to asciinema server with asciinema upload <filename>.