adds ws videos

Author: nimonian

src/express/syncing-clients.md

@@ -1,10 +1,6 @@
 # Syncing clients
 
-Now that we can make a web socket server, how do we send messages between
-clients?
-
-In this guide, we will make a simple application in which a connected client
-sends a message, and all other clients will receive the message.
+<Vimeo id="1010811238" />
 
 ## Setting up the server
 

src/express/web-socket-server.md

@@ -1,10 +1,6 @@
 # Web socket servers
 
-A web socket server enables a live, real-time connection between the client
-(e.g. web browser) and server.
-
-Most importantly, this is a two-way connection, so the server can send messages
-to the client without the client needing to make a GET request.
+<Vimeo id="1010811222" />
 
 ::: info