Failing to download iPlayer file

[Michael Eacott]

My apologies for not using my registered read only email address of 
xmichael at eacott.org.uk that I cannot send from and also not changing my 
email client Thunderbird default from html format to plain text.

I wanted to download this video 
https://www.bbc.co.uk/iplayer/episode/p099f5jp/greta-thunberg-a-year-to-change-the-world-series-1-episode-2

I used this command get-iplayer –pid=p099f5jp --modes=hvfxsd1 tvmode 
good --type=tv

Here's the Terminal window

get-iplayer –pid=p099f5jp --modes=hvfxsd1 tvmode good --type=tv
get_iplayer v3.27, Copyright (C) 2008-2010 Phil Lewis
   This program comes with ABSOLUTELY NO WARRANTY; for details use 
--warranty.
   This is free software, and you are welcome to redistribute it under 
certain
   conditions; use --conditions for details.

Matches:
6696:    Spooks: The Greater Good - -, BBC One, b06dngb6
7282:    The Good Dinosaur - -, BBC One, b07h1m7d
INFO: 2 matching programmes

So what may I be doing wrong please?