As above, I've not tried downloading audio from Youtube and I have tried audacity as a recorder. Audacity can be a pain to setup and I've had some computers that require a little wiring (an audio cable from the speaker socket to the microphone socket) to make the recording work.
there do seem to be a lot of downloads that say they can do the job so it's quite possible there is one out there. My usual option is download.com for such things. Here are a couple of their recommended programs
https://download.cnet.com/Free-YouTube-Downloader/3000-2071_4-75827483.html
https://download.cnet.com/ytd-video-downloader/
try a search for youtube downloader for more suggestions. Download.com do claim to screen for malware but some of the non-malicious items can be a pain.
They also have Audacity at https://download.cnet.com/Audacity/3000-2170_4-10058117.html
there do seem to be a lot of downloads that say they can do the job so it's quite possible there is one out there. My usual option is download.com for such things. Here are a couple of their recommended programs
https://download.cnet.com/Free-YouTube-Downloader/3000-2071_4-75827483.html
https://download.cnet.com/ytd-video-downloader/
try a search for youtube downloader for more suggestions. Download.com do claim to screen for malware but some of the non-malicious items can be a pain.
They also have Audacity at https://download.cnet.com/Audacity/3000-2170_4-10058117.html