If you use youtube-dl or other similar youtube video downloading software for legally downloading videos you might get an error –  Unable to download Youtube videos – SSL: CERTIFICATE_VERIFY_FAILED

The following method fixed it for myself..

run certmgr.msc





menu -> action -> find certificates.






choose “look in fields: issued to”

On the “contains” field type enter “google”.

click “find now”

mark all the expired certs (sort by expiry date)

right click and choose “delete”






Now try using your video downloading software again – may now work fine.