How to stream video to your TV via Wi-Fi: methods and settings

Modern multimedia capabilities allow you to transform any Smart TV into a full-fledged entertainment center, eliminating the need for HDMI cables. Wireless video streaming has become a de facto standard, allowing you to instantly share photos and videos taken with your smartphone on a large screen. This is especially useful for family gatherings or viewing content that's easier for everyone to enjoy.

There are several main protocols and technologies that provide a connection between a mobile device and a TV. DLNA, Miracast, AirPlay Proprietary solutions from Google and Samsung operate differently, but they all require a stable local network connection. Understanding the differences between these standards will help you avoid compatibility issues and playback lag.

In this article, we'll cover all current streaming methods, from built-in operating system features to specialized apps. You'll learn how to set up your equipment, what nuances to consider when choosing a transmission method, and how to resolve common connection issues.

Basic technologies for wireless video transmission

A fundamental condition for successful data transfer is the use of a unified communication standard. Users most often encounter the abbreviation DLNA, which describes a set of standards that allow devices to exchange media files. Unlike other protocols, DLNA doesn't broadcast the entire screen, but rather sends a specific media file for playback, freeing the smartphone for other tasks.

A more advanced method is Miracast, which enables real-time image mirroring. This protocol creates a direct Wi-Fi connection between devices, allowing you to display everything that's happening on your smartphone's display, including games and app interfaces, on your TV. However, it's worth keeping in mind that this approach can drain your mobile device's battery.

Apple device owners use the protocol AirPlay, which ensures high-quality transmission and minimal latency. For Android devices, Google Cast (Chromecast built-in) has become the de facto standard, allowing you to control video playback on your TV directly from the YouTube or Netflix apps.

⚠️ Note: DLNA and Miracast protocols may conflict when activated simultaneously. If the TV stops detecting your phone, try disabling one of the features in the network settings.

The choice of technology depends on your goals: DLNA or Cast are better for watching movies, while Miracast is better for sharing presentations or games. It's also important to consider that some older TV models may not support the latest video encoding standards.

Preparing equipment and network

Before you begin setup, you need to make sure all components of your system are ready to work. The most important requirement is the same Wi-Fi networkThis means that both the TV and smartphone must be connected to the same router. If you have a dual-band router, make sure both devices are on the same frequency band (2.4 GHz or 5 GHz), although modern routers often combine them into a single network.

Check your TV's software is up-to-date. Manufacturers regularly release updates that improve the stability of wireless modules and add support for new codecs. The update path is usually found in the menu. Settings → Support → Software Update.

It's also worth paying attention to signal strength. Streaming high-resolution video (4K or Full HD with a high bitrate) requires a stable connection. If the router is located far from the TV, buffering and image artifacts may occur.

Some ISPs use client isolation technologies in their routers, which prevents devices from seeing each other on the local network. If you can't find your TV in the list of available devices, check your router settings or contact your ISP.

Broadcasting from Android: Built-in Tools and Apps

Android smartphone users have several options for image transfer. The easiest way is to use the "Cast" or "Smart View" feature (the name varies by model). To activate it, pull down the notification shade and look for the icon. Smart View, Broadcast or Screen projection.

Once enabled, your phone will begin searching for compatible devices on the network. Select your TV from the list. If a PIN is requested, it will usually be displayed on the TV screen. This method uses the Miracast protocol and is compatible with most modern Smart TVs.

If the built-in function doesn't work or you're not satisfied with the transmission quality, you can use third-party apps. The leader in this area is Google Home, which allows you to control Chromecast devices and TVs with built-in Android TV.

Advanced users can stream video via a local server. By installing a server (such as Plex or Kodi) on your PC or phone, you can access files on your TV through the built-in media player using the DLNA protocol.

What to do if the phone doesn’t see the TV?

Make sure AP Isolation is disabled on your router. Check if your phone's antivirus software is blocking local connections. Restart your router, clearing the DHCP cache.

Using AirPlay on Apple devices

The Apple ecosystem offers the most seamless content delivery experience thanks to technology AirPlay 2If your TV supports this protocol (many Samsung, LG, Sony, and Vizio models released after 2019), you don't need any additional set-top boxes. Just make sure your iPhone and TV are connected to the same network.

To cast a video, open the Photos app or any video player, tap the Share icon or the AirPlay icon (rectangle with a triangle), and select your TV. The image will appear almost instantly, and your smartphone can be used as a remote control.

Screen Mirroring allows you to mirror the entire interface of your iPhone or iPad. This is convenient for sharing documents or games that don't have built-in AirPlay support. It's activated via Control Center (swipe down from the upper-right corner).

⚠️ Note: When using AirPlay in screen mirroring mode, audio may be delayed. For watching movies, it's better to use the built-in Cast feature within apps (YouTube, Netflix) rather than screen mirroring.

AirPlay 2 streaming quality is generally higher than its counterparts, thanks to support for dynamic bitrate adjustments based on signal quality. However, 4K HDR playback requires a very strong and stable Wi-Fi connection.

Broadcast via browser and DLNA servers

If you need to play a video file that's not supported by your TV's built-in player, or if the file is located on your computer, the best solution is to use a DLNA server. This method involves one device (the server) providing access to the files, and the TV (the client) playing them.

A media server is already built into your Windows 10/11 computer. To activate it, go to Settings → Network & Internet → Status → Sharing optionsTurn on network discovery and file sharing. Then, right-click the video folder and select "Show advanced options" → "Transfer media files."

On your TV, launch the Media Player or Gallery app. Your computer should appear as a source. Navigation is handled using the remote control, making it very convenient for viewing large movie collections.

For more flexible control, you can use specialized software, for example, Universal Media Server or PlexThese programs automatically convert video on the fly to a format compatible with your TV if the original codec isn't supported.

Solving common connection problems and errors

Despite the simplicity of the technology, users often encounter problems. One of the most common is "Device not found." This almost always means the devices are on different subnets. Check if "Guest Wi-Fi" is enabled on the router for one of the devices—guest networks are isolated from the main network.

Another issue is audio and video desynchronization. This is typical for the Miracast protocol when the signal is weak. Try moving closer to the router or switching to the 5 GHz frequency, which is less crowded than 2.4 GHz.

If the video constantly pauses to buffer, reduce the playback quality in the app settings or check if the connection is busy with other tasks (downloading files, online games on other devices).

⚠️ Note: Menu interfaces and item names may vary depending on the TV's firmware version and manufacturer. If you don't find the option described, search for a similar one or refer to the manual for your specific model.

In some cases, a complete reset of the TV's network settings can help. This will clear the DNS cache and update the IP address on the local network, which often resolves issues with the device being "invisible."

Why does my TV say "Out of memory" when I try to stream a video?

This is a caching error. The TV is trying to buffer the file, but there's not enough free RAM. Solution: Close background apps on the TV or use DLNA instead of Miracast, as it's less resource-intensive.

Is it possible to stream video via Wi-Fi Direct without a router?

Yes, many TVs support Wi-Fi Direct, which creates a direct access point. However, the transfer speed in this mode is often lower than through a full-fledged router, which can result in reduced picture quality.

How to improve image quality when screen mirroring?

Close all unnecessary apps on your phone to free up CPU power. Make sure your phone isn't in power-saving mode, which limits Wi-Fi performance. It's best to use a router that supports Wi-Fi 5 (ac) or Wi-Fi 6 (ax).