How to Stream Video from Your Computer to Your TV via WiFi: A Step-by-Step Guide

Modern technology allows you to transform an ordinary monitor into the center of a home theater, using only the potential of your home network. Broadcast media Over-the-air streaming eliminates the need for long HDMI cables and eliminates the tangled mess of wires behind furniture. This is convenient when you need to quickly share vacation photos or play a movie downloaded to your laptop's hard drive.

The main advantage of the wireless method is the flexibility of control and freedom of movement. You can control playback from the couch using your smartphone or PC keyboard, while Smart TV acts as a powerful decoder. However, for stable operation, it is critical that both devices are on the same local network.

There are several data transmission standards, each of which has its own characteristics. DLNA suitable for playing files, Miracast duplicates the entire screen, and proprietary technologies like AirPlay or Chromecast tailored to specific ecosystems. The choice of method depends on your goals and equipment specifications.

Wireless multimedia transmission technologies

Before you begin setting up, you need to understand the protocols, as they determine image quality and ease of use. DLNA (Digital Living Network Alliance) — is a classic standard that allows one device (the server) to transfer files to another (the renderer). In this setup, the TV simply reads the video stream from the computer, without overloading the PC's processor with unnecessary tasks.

Unlike DLNA, the technology Miracast (or Wi-Fi Direct) works on the principle of mirroring. It creates a direct connection between devices, transmitting an exact copy of what's happening on the computer monitor to the TV screen. This is useful for showing presentations or playing games, but can consume more system resources.

• 📺 DLNA — ideal for watching movies in high quality, since the decoding load falls on the TV.
• 💻 Miracast — the best choice for duplicating your desktop or running applications not installed on your TV.
• 🌐 Chromecast built-in — allows you to send Chrome browser tabs or content from applications directly to the screen.

⚠️ Please note: Your WiFi network bandwidth directly impacts image quality. To view 4K video via Miracast, you may need a router that supports the 802.11ac (5 GHz) standard.

It is important to understand the difference between streaming and full duplication. When using DLNA You can turn off the laptop screen or minimize the window, and the movie will continue to play on the TV. When you choose Miracast The image on the PC must remain active, which may interfere with parallel work on the computer.

Some modern Samsung and LG TVs use their own modifications of the protocols, such as AllShare or Smart Share, but they are generally backward compatible with standard Windows solutions. The main thing is to ensure that your firewall isn't blocking connections on your local network.

Preparing the computer network and equipment

Successful broadcasting is impossible without a properly configured network environment. The first and most important rule: the computer and TV must be connected to the same routerIf your PC is connected via cable and your TV via WiFi, that's fine. The main thing is that they're on the same subnet.

Check the network type in your operating system. Windows may treat new connections as "Public" by default, which hides your computer from other devices. You need to switch the profile to "Private" to allow discovery.

To do this, follow these steps:

1. Open Settings from the Start menu.
2. Go to the Network and Internet section.
3. Select Status and click Properties for your connection.
4. In the Network Profile block, select the option Private.

It's also worth making sure that client isolation isn't enabled on your router. This feature is often enabled on guest networks at hotels or cafes and prevents devices from seeing each other. At home, it should be disabled.

Signal stability is another key factor. If there are too many walls between the router and the TV, streaming may experience lag. In such cases, it's best to use a wired connection for your desktop PC, leaving WiFi for the TV.

Setting up a DLNA server in Windows 10 and 11

The most reliable way to share video files is to use Windows Media Streaming's built-in functionality. The system allows you to share movie folders so that the TV sees them as external storage.

To begin, open "Media Streaming Settings." In Windows 10, you can find this by searching for "Media Streaming Settings." In the window that opens, click the button Enable media streaming.

Once the feature is activated, the system will prompt you to select the library name and devices that are allowed access. Find your TV in the list (it may appear as LG TV, Samsung or Unknown Device) and make sure that the “Allowed” box is checked next to it.

Next, you need to add the video folders to the standard Windows libraries ("Videos"). Simply drag the movie folder to the appropriate section in File Explorer or add the path through the folder properties.

Now, on your TV remote, find the media app. It may be called "Media," "Home Network," "Smart View," or have the manufacturer's logo. Inside, you'll see your computer's name and available folders.

If your TV doesn't play the file, it's most likely a codec issue. The built-in Windows DLNA server can't transcode video on the fly; it only streams it. In this case, installing third-party software will help, as discussed below.

Screencasting (Miracast) and the Chrome browser

If your goal is to display browser content or launch a game, use the "Connect" feature in Windows. Press the key combination Win + Kto open the connection panel. The system will begin searching for available wireless displays.

You also need to activate signal reception on your TV. This is a function in the Samsung menu. Screen Mirroring, on LG — Smart View, on Sony - Screen mirroringOnce paired, the PC screen will be completely copied to the large panel.

What to do if the connection keeps breaking?

A common cause of Miracast disconnects is the WiFi adapter's power saving mode. Go to Device Manager, find your wireless adapter, open its properties, and in the "Power Management" tab, uncheck "Allow the computer to turn off this device to save power."

An alternative option is to use a browser Google ChromeIf your TV has built-in Chromecast or supports the Cast protocol, you can cast a browser tab. Open the browser menu (three dots), select "Cast," and select the target device.

The advantage of the Chrome method is the ability to cast a specific tab rather than the entire desktop, which reduces the system load. You can also cast the entire screen or even a single application window.

However, it's worth considering the latency. While it's not critical for viewing photos or videos, for fast-paced games or text editing, a noticeable lag between mouse movement and the cursor on the TV screen may be noticeable.

Using third-party software

Windows' built-in tools are good, but sometimes limited by file formats. Third-party media server programs solve codec incompatibility issues by transcoding video on the fly into a format your TV can understand.

One of the most popular solutions is PlexThis program not only creates a server but also automatically downloads covers, descriptions, and actors for your video library, transforming the file list into a beautiful interface.

• 🎬 Plex — a powerful server with a beautiful interface, requires account registration.
• 📺 Kodi — a free media center with a huge number of plugins, works on both PC and TV.
• 🚀 Universal Media Server — a lightweight server that doesn't require complex setup, ideal for older TVs.

Another great solution is the program Home Media ServerIt features high-speed file scanning and excellent compatibility with devices of various years of manufacture. The interface may seem complex to a beginner, but the functionality is worth it.

⚠️ Important: When installing third-party servers, ensure that exception rules are created for them in Windows Firewall. Antivirus software may also block a program's attempts to open ports for the local network.

Using the software allows you to broadcast video in formats HEVC (H.265) Even on older TVs that don't natively support this format, the computer takes care of the heavy-duty decoding, sending the finished image to the TV.

Solving typical problems and diagnostics

Even with proper setup, issues may still occur. If your TV stops detecting your computer, first check your antivirus software. Often, after updating your security software, the network is automatically marked as public, blocking file access.

Buffering issues (video stuttering or freezing) usually indicate insufficient bandwidth. Try lowering the video bitrate or closing background downloads on other devices. Restarting your router may also help.

If there is sound but no image (or vice versa), the problem lies in the codecs. In the media server settings (for example, Plex), you can force audio transcoding to the format AAC or MP3, which is guaranteed to be supported by most TVs.

In rare cases, resetting network settings can help. Open a command prompt as administrator and enter the following command:

netsh winsock reset

After running the command, be sure to restart your computer. This will clear the network protocol cache and may resolve connection errors.

Why can't the TV see the computer via WiFi?

Most often, the problem is with the network profile. If Windows considers the network "Public," it hides the PC. Also, check if Network Discovery is enabled in Control Panel.

Is it possible to stream 4K video wirelessly?

Yes, but stable 4K HDR streaming requires a Wi-Fi 5 (AC) or Wi-Fi 6 (AX) router and a 5 GHz connection. Constant buffering is possible on the 2.4 GHz band.

Video is lagging when streaming from a laptop. What should I do?

Try lowering the stream quality in the broadcast settings. If you're using Miracast, close any heavy programs on your PC. For DLNA, the issue could be related to hard drive speed or file system fragmentation.