Unfortunately, YT/Google TV has near bulletproof DRM encryption on studio provided content and most of the downloaders claiming to work do jack zip! Best to do an unprotected HDMI cap from a device like ATV4k at the highest resolution/settings and depending on the HDMI cap audio quality, record the YT audio direct via Audacity then merge the two together.
There’s web-dls that come from DRM encrypted YT content. Scene groups are capable of doing it.