Hello,
How to add the FB loginization you can watch here https://youtu.be/mBp33hPMgnA
We don’t have any other video tutorials.
May I know must we re-enter FB password to use this function?
Don’t understand this question. Are you talking about entering the password while you using the FB login as site user? You can control this from the FB settings https://prnt.sc/115q3s6
Regards