To make YouTube full screen on a Samsung smart TV, simply press the Select or Enter button on your remote while a video is playing to reveal the player controls, then choose the full-screen icon (a square with arrows pointing outward). That’s the direct, built-in method that works on every Samsung smart TV model with the YouTube app installed.
How to make YouTube full screen on your Samsung smart TV
When you start playing any YouTube video on your Samsung smart TV, the video player interface appears with a row of controls at the bottom. These controls include play/pause, skip forward or backward, volume, and the full-screen toggle. To activate full screen mode, press the Select or Enter button on your remote control, this is the large central button on most Samsung remotes, to make the controls visible if they are hidden. Then use the arrow keys to highlight the full-screen icon, which looks like a square with arrows pointing toward each corner, and press Select or Enter again. The video will immediately expand to fill your entire TV screen, removing the YouTube app’s menus and recommendations from view. If the full-screen icon is unresponsive, you may need to reinstall YouTube TV on Samsung smart TV to resolve app glitches.
While in full screen mode, you can still use your remote’s basic playback buttons, play, pause, volume, and mute, without exiting the full-screen view. To skip ahead or back through the video, press the left or right arrow keys on your remote to jump in ten-second increments. If you want to exit full screen and return to the regular YouTube interface, press the Back or Exit button on your remote, and the video will shrink back to its normal size within the app.
This method works for every video on YouTube, including live streams, music videos, and user-uploaded content. The full-screen toggle is always available in the player controls, so you never need to dig through settings menus just to expand a video. It’s the fastest and most reliable way to get the immersive viewing experience you’re after, especially when you’re watching live TV on a smart TV and want to eliminate on-screen clutter.
Fix YouTube not showing correctly in full screen (zoomed, cropped, or black bars)
Sometimes pressing the full-screen icon doesn’t give you a perfect picture. You might see black bars on the top and bottom, the video might appear zoomed in with the edges cut off, or the image could be stretched or cropped incorrectly. This usually isn’t a problem with YouTube itself, it’s a mismatch between the video’s aspect ratio and your Samsung TV’s display settings. To correct this, you need to adjust the TV’s Picture Size or Screen Fit setting, which controls how the TV handles different video formats.
Press the Home button on your remote to open the smart hub, then navigate to Settings (the gear icon). From there, go to Picture, then Picture Size Settings (the exact menu name may vary slightly by model year). Look for an option called Picture Size or Screen Fit. If it’s set to 16:9 Standard or Zoom, the TV may be cropping or stretching the YouTube video. Change it to Screen Fit or Original to display the video exactly as it was encoded, without any cropping or scaling. This will eliminate black bars for widescreen content and ensure that nothing is cut off at the edges.
If the video still shows black bars after selecting Screen Fit, that’s normal, some YouTube videos are uploaded in aspect ratios like 21:9 ultrawide or 4:3 standard, and the TV can’t fill the entire screen without distorting the image. In that case, leave the setting on Screen Fit and accept the bars as part of the original video format. For most modern YouTube content, which is 16:9, Screen Fit will give you a perfect edge-to-edge display.
This setting applies globally to all apps, not just YouTube, so it won’t hurt to check it even if other apps look fine. Once you’ve changed it, return to your YouTube video, it should now fill the screen correctly without any unwanted cropping or black bars.
Troubleshoot YouTube full screen that won't work
If the full-screen button doesn’t respond, or if the video stays small even after selecting the icon, the problem is usually with the YouTube app or the TV’s software. Here are four verified fixes to try in order, from simplest to most thorough.
Update the YouTube app
An outdated YouTube app can cause full-screen mode to malfunction. To update it, press the Home button on your remote, go to Apps, find the YouTube app in your list, and select it. If an update is available, you’ll see an Update option, select it and wait for the download to finish. After the update, relaunch YouTube and test full screen again.
Clear the YouTube app’s cache and data
Corrupted cache files can break the full-screen toggle. To clear them, go to Settings, then Apps (or Application Manager), scroll to YouTube, and select Storage. From there, choose Clear cache first, then Clear data. Clearing data will reset the app to its default state, so you’ll need to sign back into your YouTube account. This often resolves persistent display issues.
Update your TV’s firmware
Samsung releases regular software updates that fix bugs affecting apps and display settings. Navigate to Settings, then Support, then Software Update, and select Update Now. If an update is available, install it and restart your TV. After the reboot, open YouTube and try full screen again, the update may have patched the issue.
Reinstall the YouTube app
If none of the above steps work, uninstall and reinstall YouTube as a last resort. Go to the Apps section on your smart hub, navigate to the Settings icon (usually in the top-right corner of the Apps screen), find YouTube in the list, and select Reinstall. This removes the app entirely and installs a fresh copy, which clears any deep-seated corruption. After reinstalling, sign in and test full screen mode.
If you’ve tried all four fixes and full screen still doesn’t work, the issue may be with the specific video you’re watching, some videos are uploaded with locked aspect ratios that prevent full-screen expansion. Try a different video to confirm. In most cases, updating the app or clearing its cache resolves the problem, and you’ll be back to watching YouTube edge-to-edge on your Samsung smart TV. When you’re done watching, you can get back to regular TV on my Samsung smart TV to resume your live broadcast.
