I watched your videos on pfsense & Chromecast Across Subnets a little earlier. After installing the Avahi (I think it is pronounced a-VAH-ee), I tried browsing my LAN when connected to it through OpenVPN through the OpenVPN server running on my pfSense box.
I wasn’t able to. Do you know of a way to make that work? I found a bunch of posts from the mid-20-teens or before that for various reasons mDNS does not get routed between subnets in general. Now you report that Avahi will do the trick, but it evidently does not do it from one subnet to another VPN subnet.
Would you know otherwise or have a way to make it work?