Thank you for pointing it out.
I modified the /etc/yum.repos.d/fedora-cisco-openh264.repo file adding os ath the end of the link:
[fedora-cisco-openh264]
name=Fedora $releasever openh264 (From Cisco) - $basearch
baseurl=https://codecs.fedoraproject.org/openh264/$releasever/$basearch/os/
type=rpm
enabled=1
enabled_metadata=1
metadata_expire=14d
repo_gpgcheck=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-$basearch
skip_if_unavailable=True