Today we had to install mod_flvx on CentOs server and here are the steps you need to do. I guess you have already installed Apache web server being cpanel server. Just be sure that you have Apache 2.2 version on the server or else you might have errors during compiling mod_flv.
Compile And Install Module:
/usr/local/apache/bin/apxs -i -a -c mod_flvx.c
Add the following handler in /usr/local/apache/conf/httpd.conf
AddHandler flv-stream .flv
service httpd restart