my Blackberry Z30 got stuck in the password reset screen

I can't access my blackberry Z30. Every time I try to enter it, a message appears saying the my password has expired. Then I tried to enter a new password but that screen keeps refreshing (i.e. keeps asking me to enter a new password). And I can't pass that screen.

any help? THANKS in advance!

Reload your OS using BlackBerry Link or by using an Autoloader.

Would this delete my photos and videos?

I did a backup yesterday, does this backup include my photos and videos?