If your Windows computer is loaded with music songs, movies, you can play them on your phone or tablet so as to listen to your music or watch your movies in the local network anywhere in your home, kitchen, bathroom, balcony, garden, etc. nPlayer for iOS is a great app to stream movies, videos, music from Mac or PC to iPhone in your local network. Go to the Control Panel on your Windows computer, turn on network discovery and file sharing on the computer first. You can find more details from this Windows 10 network file sharing guide. After that, go to Windows Explorer to add and share media files and folders that you want to be shared with other devices in your home network.
Below, we’ll show you how to stream media with the nPlayer app on iPhone. Connect iPhone and PC to the same Wi-Fi network. Run nPlayer on your iPhone. Switch to the Network tab from the bottom menu bar. All your saved devices and storages will be listed here.

To add a new device or storage service, tap the Add(+) icon at the top left corner. You will then be taken to the New Server screen with various server types and cloud storage, such as WebDAV, FTP, SFTP, SMB/CIFS, UPnP/DLNA, Toshiba, Box, Dropbox, OneDrive, pCloud, Yandex.Disk.

Tap the Scan Network… in the middle of this list to let the player app scan for nearby devices. Wait for a second until the player find your PC in the same local network.

Tap your PC name, then type your computer login name and password into the User and Password fields separately. Tap Save. You will then be able to access and browse through the shared files and folders on your Windows computer. Tap on a music file to listen or a movie to watch from your iPhone.
PC iPhone media streaming alternative
Since iOS 13, you can now share files between Windows PC and iPhone iPad over Wi-Fi using the Files app without third-party apps.