Added repo for fc25 from https://zmrepo.zoneminder.com/ and added the exclude=zoneminder* as mentioned, then installed with dnf

dnf install zoneminder

Set up database stuff (change user/password)

mysql -uroot -p < /usr/share/zoneminder/db/zm_create.sql
mysql -uroot -p -e "grant all on zm.* to \
  'zmuser'@localhost identified by 'zmpass';"
mysqladmin -uroot -p reload

and adjust /etc/zm/zm.conf accordingly

set the timezone in php.ini “Europe/Paris”

installed mod_ssl

dnf list mod_ssl

enable and start httpd & zoneminder

systemctl enable httpd
systemctl start httpd
systemctl enable zoneminder
systemctl start zoneminder

go to https://localhost/zm