There are still many having the audio-only issue, but with DRM YouTube videos trying to be downloaded with the YouTube Movies Downloader.
I just tried this video as well, and it works, screenshots below. So it's not DRM.
First maybe try, with SF closed, renaming the cache folder to something like cacheOld. (look here about that)
If not, then uninstall your current SF version using the SF uninstaller, download the full offline installer, and install it again.
One last trick, always wait for the video itself to start playing before attempting to analyze with SF. Wait for any ads etc. to pass, if they are there, before the video plays.
P.S. I know Germania this is, for the most part, a repeat of your post # 13, but again just proof of concept that it works, and works for others.
SCREENSHOTS:
