parole media player in not working

how to set up parole media player in fedora ,it is showing messagemessage

i click install button but it is not working

sudo dnf install gstreamer1-plugin-openh264 --enablerepo=fedora-cisco-openh264

Have you installed rpmfusion repositories? If so, do this too (you may need it in the near future):
sudo dnf install gstreamer1-libav