Sierra update issues - can't expand videos.
Can't expand and watch videos (eg YouTube and Facebook): asks for admin password but doesn't take me anywhere. Reinstalled and wasted hours - help appreciated.
MacBook Air, iOS 10.0.3
FWIW, I have used YouTube pretty much since it came into existence on OSX, Windows and Linux. It has never once asked for a password much less an admin password. You might want to check for malware using malwarebytes.