Add demo video links.

README.md

@@ -6,22 +6,25 @@ Features:
 
 * TUN/TAP and libpcap integration that allows the server to be bridged to a
 real, physical network. This allows (emulated) dosbox users to play alongside
-users on real DOS machines. (See [BRIDGE-HOWTO](BRIDGE-HOWTO.md) for more
+users on real DOS machines (see [BRIDGE-HOWTO](BRIDGE-HOWTO.md) for more
 information).
 
 * Built-in PPTP server that allows Windows 9x users to connect over the
-Internet  using the VPN software that shipped with the operating system.
-(See [PPTP-HOWTO](PPTP-HOWTO.md) for more information)
+Internet  using the VPN software that shipped with the operating system
+([demo video](https://www.youtube.com/watch?v=ut37z6EE5Hc);
+see [PPTP-HOWTO](PPTP-HOWTO.md) for more information).
 
-* Support for the `ipxpkt.com` packet driver protocol, allowing software that
-uses the packet driver interface to get a network connection over dosbox's
-built-in IPX protocol support.
+* Support for the `ipxpkt.com` packet driver protocol, allowing
+TCP/IP-over IPX; software that uses the packet driver interface can
+more easily be used in DOSbox
+([demo video](https://www.youtube.com/watch?v=5VeVaFbORhI)).
 
 * Sends background keepalive pings to idle DOSbox clients to prevent users
 behind NAT routers from being timed out.
 
 * Proxying to Quake servers, so that you can make UDP-based Quake servers
-appear as "local" IPX servers.
+appear as "local" IPX servers
+([demo video](https://www.youtube.com/watch?v=SB3JOjdhJHI)).
 
 * Syslog integration for audit logging when running a public server.