Windows 10 has a Media Server.
This can easily be configured to be accessible to all the devices on your network.
Take a look at the video to see how.
For the audio and video fans it is important to have an AV receiver like the SONY STR-DN860 that supports DLNA media streaming. Also your equipment needs to have the correct specifications to support your TV or streaming device. This is a short review and tutorial for the SONY STR-DN860.
My favourite streaming device is the ROKU4. This supports 4K@60fps, HDCP2.2 and HDMI2.0
I have started using Serviio as a Windows 10 Media Server. This software is very neat and easy to manage.