So I had some pretty big blockers using the new library and discovery methods. I also finally realized what kind of firewall rules need to be created in order for zeroconf discovery to work properly. On windows I created two rules. one inbound, one outbound, for ports 1900,5353 and allowed them through the firewall. Afterwards I was able to do proper chromecast discovery without needing to disable my firewall. I also added some additional examples on how to discover numerous devices by friendly name, and I think a super important thing to include is the param discovery_timeout. I was getting many more devices using get_chromecasts() that I was not getting with get_listed_chromecasts() so I examined the difference and realized the timing is much more aggressive by default on get_listed_chromecasts(), the param helps alleviate that, and accounts for networks\devices that are slower to respond.