Ok, so I don't exactly know what I've been doing differently, but I'm getting different results (still not downloading though).
I'm getting either:
[cli][info] Found matching plugin stream for URL Hds://"URL"
error: Unable to open URL:"URL" (403 Client Error: Forbidden)
Or:
[cli][info] Found matching plugin stream for URL Hds://"URL"
error: No stream found on this URL: Hds://"URL"
Note: I'll also say that I've tried this method in this reddit thread
here (hlsvariant instead of Hds). Gives same results.
Any help would be appreciated. Thanks!