zixiang-zhou
Hello,
Is your webdav server located on a local area network or a public network?
If your server is on a public network, you can access it directly through SKYBOX player. If the server is on a local area network, you need to set up NAT traversal/port forwarding yourself. Only when the server itself is publicly accessible can you use SKYBOX to access it over the public network.
What's more, if you want to access your Emby server remotely, you also need to set up NAT traversal/port forwarding yourself to ensure the server itself can be accessed over the public network.
Hope that helps. Let us know if you have other concerns.