Thanks guys.. I downloaded Media Feature Pack for Windows 10 N October 2k18, but it did not work ( I could not install it, cause it said "it is has no use for my notebook"), so I tried April 2k18 version and now both option h264 are available 
Best posts made by exathil
-
Opera for WindowsRE: Windows 10 - h.264 problem.
-
Opera add-onsRE: Weather
@timleland Well apparently it was Opera issue. None of extensions was working properly. After reinstalling the browser, everything works fine! Sorry for inconvenience!
-
Opera for WindowsRE: How can I change my passwords for synchronized passwords
@burnout426 For now I am sure that only passwords are protected by passphrase. Once I log in I have all access expect my storaged passwords. Thanks for you help man. I am gonna tomorrow play with the stuff..