Modern smartphones have powerful screens, but they still cannot compare with the diagonal size of a home TV when watching movies or music videos. Fortunately, the ecosystem Android and platforms YouTube provide several convenient ways to stream content from a mobile device to the big screen without the need for unnecessary wires. This turns ordinary viewing of short videos into a full-fledged cinema experience right in your living room.
The basic operating principle of all image transmission methods is based on the use of a single network Wi-Fi. Your phone and TV must be connected to the same router to exchange data with minimal latency. In this article, we will analyze in detail all available protocols, from the built-in function Google Cast to more complex DLNA settings, and also consider possible connection errors.
Before you start setting up, make sure that your equipment supports the necessary technologies. Most modern TVs with the Smart TV function already have built-in modules for receiving the signal, but for older models you may need to purchase an additional adapter. We'll help you determine the best connection method depending on your specific technology.
Wireless video transmission technologies
There are several standards that allow you to transfer multimedia content between devices. Understanding the difference between them is important for choosing the best method. The most popular and convenient protocol is Google Cast (often called Chromecast built-in). It is built directly into the application YouTube and allows you to control playback from your smartphone, while the TV downloads the video stream directly from the Internet.
The second common standard is DLNA (Digital Living Network Alliance). It is more versatile and allows you to transfer not only videos from YouTube, but also personal files, photos and music from your phone’s memory to the TV. However, this method is used less frequently for YouTube, as it is less convenient in managing playlists compared to native Google integration.
⚠️ Note: Some older TV models may not directly support the Google Cast protocol. In such cases, the functionality is limited to DLNA only or requires connecting an external set-top box.
The third option is technology Miracast or screen duplication. In this case, an exact copy of the image from the screen of your smartphone is transmitted to the TV. This is the least effective way to watch YouTube, as it puts a lot of strain on your phone's battery and can cause image delays if the Wi-Fi signal is unstable.
Preparing equipment and network
Successful broadcasting is 90% dependent on the correct setup of your home network. The first and most critical step is to verify that both devices are on the same subnet. Users often make the mistake of connecting their phone to the 4G/5G mobile data and the TV to their home Wi-Fi, which is why they simply “can’t see” each other.
Make sure that your router emits a signal at a frequency that both devices support. Modern standards Wi-Fi 5 GHz provide much higher bandwidth, which is critical for transmitting 4K video without buffering. If you have a dual-band router, try to connect both your phone and TV to the same frequency.
☑️ Checking readiness for connection
It is also worth checking the software version on the TV. Manufacturers regularly release firmware updates that add support for new codecs and correct errors in the operation of network modules. Go to Settings → Support → Software update on your TV and install available updates.
| Connection type | Required equipment | Quality pictures | Battery load |
|---|---|---|---|
| Google Cast | Smart TV or Chromecast | High (up to 4K) | Low |
| DLNA | Smart TV with DLNA support | Depends on the file | Medium |
| Miracast | Any TV with Wi-Fi Direct | Depends on the phone screen | High |
Using the built-in broadcast function
This is the easiest and recommended method for most users. It does not require installation of third-party applications and works out of the box on the vast majority of devices. Open the application YouTube on your smartphone and find the video you want to watch.
At the top of the player you will see a rectangle icon with Wi-Fi waves in the corner - this is the Cast (Cast) button. Click on it. The application will automatically scan the network and show a list of available devices. Select your TV from the list.
If the cast icon is gray and not clickable, check to see if your phone has Power Saver mode enabled, which often blocks background network activity from apps.
After selecting a device, the video will start playing on the TV screen. Your smartphone at this moment turns into a remote control: you can pause, rewind, change the volume or select the next video without interrupting viewing on the big screen. Moreover, you can minimize the YouTube application or even turn off the phone screen - playback on the TV will continue.
Sometimes it happens that the TV does not appear in the list of available devices, even if they are on the same network. In this case, try rebooting the router and both devices. Also make sure that the YouTube application is running on the TV or signal standby mode is active.
Configuration through third-party applications and DLNA
If your TV does not support native Google Cast, intermediary applications come to the rescue. One of the most popular solutions is an application Web Video Caster or similar tools that can intercept a video stream and send it to TV via the DLNA protocol or through the TV’s built-in browser.
The principle of operation of such apps is that they open the mobile version of the YouTube website within themselves, find a direct link to the video stream and transmit it to the TV’s media player. This allows you to bypass the limitations of older Smart TV systems that no longer receive updates to the official YouTube application.
⚠️ Attention: When using third-party applications for YouTube streaming, the SponsorBlock function or the display of advertising may be disrupted, since the stream is processed differently than in the official client.
To configure, download the selected application from Google Play i Install the companion app (if required) on your TV. Follow the onscreen instructions to pair. Usually the process takes no more than a minute. Once connected, simply paste the link to the video or find it through the app's built-in search.
Why can't some videos play through DLNA?
Some copyrighted broadcasts and restricted videos (such as premieres or paid content) may block transmission through third-party DLNA clients due to DRM protection. In such cases, only the official Cast method or an HDMI cable will help.
Solving problems with connection and buffering
Even with an ideal setup, users may encounter problems: the video slows down, the sound and picture are out of sync, or the connection is constantly disconnected. Most often, the reason lies in an overloaded Wi-Fi channel or a weak signal where the TV is installed.
Try to move your phone closer to the router during the broadcast to eliminate problems with signal reception on your mobile device. If the TV is connected via a LAN cable, make sure that the cable is working and supports the required speed (category at least Cat5e for gigabit networks).
Another common problem is an outdated version of the application. Go to Google Play, find YouTube and click the Updatebutton if it is active. The same goes for the system component Android System WebView, which is responsible for displaying web content in many applications.
The stability of the broadcast directly depends on the quality of the Wi-Fi signal. If the router is located far away, consider purchasing a Wi-Fi repeater or using PowerLine adapters to improve communication.
Alternative methods: HDMI and USB adapters
In situations where a wireless connection is impossible or unstable, there is always a reliable wired option. Using an adapter USB-C to HDMI allows you to output an image from your phone to any TV that has an HDMI input. This method guarantees maximum picture quality and no delays.
However, it is worth considering that when connected via HDMI, the phone will work in screen mirroring mode. This means that the phone interface will be visible on the TV, and you will have to control the video directly from the smartphone screen, which is not as convenient as using Cast. In addition, this method quickly drains the battery.
For TVs without Smart TV, an excellent solution would be to purchase a separate dongle adapter, for example Google Chromecast or Xiaomi Mi TV Stick. These small devices plug into the TV's HDMI port, connect to Wi-Fi, and add Smart TV functionality to even the oldest models, making the process of casting from Android as easy as on modern panels.
Why doesn't the cast button appear in the YouTube app?
Most often this is due to the fact that the phone and TV are connected to different networks (for example, the same 2.4 network GHz, another 5 GHz with client isolation) or the AP Isolation function is enabled on the router. Also check if the application is blocked by a firewall.
Is it possible to stream videos if there is no Internet, only a local network?
The official YouTube application requires Internet access to authorize and receive a list of videos. However, if the video is downloaded to the phone's memory in advance (YouTube Premium function), some players allow you to broadcast local files via DLNA without access to the global network.
How to output sound to external speakers when broadcasting?
When using the Google Cast method, the sound is usually transmitted directly to the TV. If your TV has bad speakers, connect a soundbar or soundbar to it via optical output or HDMI ARC. In this case, the volume is controlled by the remote control of the TV or soundbar.
Does a discharged phone affect the quality of the picture on TV?
No, since when using Cast the phone acts only as a control panel. The video stream goes from YouTube servers directly to the TV. You can even turn off the smartphone screen or launch other applications, and the video on TV will go without changes.