There are several options for streaming videos to, or rather through, an Android device.
VLC Direct is an Android app that links directly to your VLC player on a PC. Never managed to make this work.
AirStreamAirStream contains two applications: one for PC and one for Android. It will serve files from a PC, making them available on Android. The solution is fairly stable and reliable.
This option will use media server on a PC and UPnP client on Android.