whoa. I'm going to try installing tailscale on the googletv chromecast dongle. Because one of the biggest issues with Chromecast was that it and the device casting from had to be on the same wireless LAN. So when traveling I had to either use a travel router or turn my phone/tablet into an AP. Tailscale might solve that. I already use tailscale for everything else. Just never thought about installing it on Googletv chromecast. Thanks for the suggestion.
You still won't be able to actually cast to a Chromecast device unfortunately, since that requires mDNS to work, which only works in the same broadcast domain (i.e. you'd need an L2 VPN, but Tailscale is L3).
