youtube-dl downloading issue where login details required

Hi all,
I'm new to using youtube-dl (only started using it yesterday) and not that technically minded, but have had some success downloading stuff from CBC.ca site.

The problem I'm having is downloading anything that would require me to login on their website; for example this file:
https://watch.cbc.ca/media/grand-designs-australia/season-1/episode-1/38e815a-00b30a2ba2e

I tried using youtube-dl's -u and -p commands, but I always get the following error:
https://watch.cbc.ca/media/grand-designs-australia/season-1/episode-1/38e815a-00b30a2ba2e
ERROR: Unable to download XML: HTTP Error 402: Payment Required (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

here's the command I use so you can see whether I'm entering it correctly:
youtube-dl -u USERNAME -p PASSWORD -F https://watch.cbc.ca/media/grand-designs-australia/season-1/episode-1/38e815a-00b30a2ba2e
where I'm putting my valid CBC.ca username and password as USERNAME and PASSWORD. I've tried putting my username/password both inside speech marks and without them, but still get same issue. I also tried leaving -p command out so that youtube-dl prompted me for password, which it did, but when I typed it in I still got same error message; I did notice that while I was typing password I was prompted for nothing was appearing on screen so not sure if that's a clue to what's wrong or not?

I'm pretty sure it's my issue and not youtube-dl's so if anyone can see what I'm doing wrong please let me know.

Thanks