Dê uma olhada aqui:
NOTE: Unless you opt to change the default value, the installer sets the location for recorded programmes to iPlayer Recordings on the Windows desktop of the administrator user who ran the installer. If you have multiple users running get_iplayer on one Windows PC, the other users will need to configure their own output folders with the CLI:
get_iplayer --prefs-add --output "%USERPROFILE%\Desktop\iPlayer Recordings"