Hi Richard,
In this particular case, there is no need to run /opt/kaltura/bin/kaltura-db-update.sh so we can ignore that part.
Now our issue is with why restarting Apache fails.
Please:
# service httpd restart
from the shell and then look at the error logs under /opt/kaltura/log/kaltura_apache_err*log
and /var/log/httpd/error*log
lets see what it says..