Among other things, I want to install ffmpeg on a CentOS server of mine (just a personal server - nothing too special).  I noticed that one set of installation instructions advise to add a DAG repository: [dag]name=Dag RPM Repository for Red Hat Enterprise Linuxbaseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/daggpgcheck=1enabled=1The name sounds familiar but I'm not sure if I've used this one before.  How can I tell if it's reputable / safe / reliable? 
How can I tell if a third-party repository is reputable?
centos;repository