He really highlights all the reasons we chose Mumble. Free and open source, private, and has lots of admin customizability. It's too bad he didn't talk about speed, though, because the trade off between sound quality is it's slower to send a higher quality (read: larger) sound.
Where is the bandwidth tests? What about latency? What about client resources and how it affects performance?
And yeah, this is also important. Almost everybody in our clan has complained about Discord resource usage since we've started encouraging its use.
it said discord and mumble were the same. how good his testing methodology was though
It can't be that good if that's the conclusion he came up with. The fact that you can't even choose the location of the server that you're connecting to is a reason to disregard any speed comparison between Discord and any other VOIP. Obviously Mumble will be faster if the Mumble server is in Chicago and the Discord server is in LA, for example.