@ blahblahblahblahblah,
Please post the URL to the site you want to record audio from. I have Windows 8.1 as well so I'll try to record the audio to see if it can be done.
In my particular case Audio CD wasn't selected. Doing that enables playback. Don't ask me why I didn't check that.Works for me:
Are you sure to have ticked the Audio CD selection ?
There are VLC plugins to invoke YT-DLP automatically.