#1 - SF will not download CC and/or srt and/or vtt.
#2 - A movie that downloaded fine yesterday now only shows as being able to download audio.
Otherwise, it can work and impressed it gets many now in 1080p, as before it would not.
This movie downloaded perfect yesterday other than NO cc and/or srt and/or vtt, but now only offers audio.

Other movies also tested get NO cc, at least not for English download, using srt or vtt or using the remux option.
Yet, as can see they ARE selected.

Note also YouTube movies and TV are DRM and only other YouTube DRM downloader I found was CG, and it did get the srt's.

Most other paid and free YouTube downloaders only handle the NONE DRM videos.
Also, note that a clean uninstall and re-install were done. Versions tested 6226 back to 6221.
There are ongoing issue(s) with YouTube, but the CC not downloading should work if another program gets them.
Additional notes: I closed and reopened SF, rebooted the computer, logged out and back into YouTube etc ...
ADDED, that fast. The first movie shown here now offers 1080p download. Again, this shows bugs in SF as, again, another downloader is working fine.