Base on my knowledge, add-ons such as skin model and sounds only appeared on the client's PC if they downloaded it. However, there are some L4D2 modded server when I connected, I can see other players using skin model that I didn't subscribed to.
I also noticed these type of server usually take some times to load the first time when I connected, it seems like the server push download the skin model to my PC.
I'm planning to place a tank music vdk file on my dedicated server and would like everyone who connected to the server to use it.
Does anyone know how they do it? Was it a plugin that enable this?