I'm running centos 6 and installed nginx using 'yum install nginx'. Videos are not working and I don't know whether I have the rtmp module or not. Here is the text from the yum install:

Installing:
collectd-nginx x86_64 4.10.9-4.el6 epel 14 k
munin-nginx noarch 2.0.33-1.el6 epel 26 k
nginx x86_64 1.10.2-1.el6 epel 462 k
nginx-all-modules noarch 1.10.2-1.el6 epel 7.7 k
nginx-filesystem noarch 1.10.2-1.el6 epel 8.5 k
<snip>

It says 'nginx-all-modules' on the 4th line but no other clue. Is there a way to tell if I have the rtmp module? If I don't have it is there a way to install it?

extra info: I did previously install nginx using the nginx-1.13.9.tar.gz tarball and also installed the nginx rtmp module from the git clone and it worked but i couldn't get nginx to work with multiple domains using that install. Should I go back to the tarball install? or is there a way to get rtmp working with my current 'yum' install? Thanks for any help.