[Bug] iPad Safari YouTube fullscreen video only takes up a quarter of the screen

Hey there huangky,

If this is only happening with using the YouTube app, then try the steps provided by their support pages here:

Watch in full screen mode - iPhone & iPad - YouTube Help

You can also try a few steps on your iPad when apps aren't working as expected:

1. Close and reopen the app

Force the app to close. Then open the app to see if it works as expected.

2. Restart your device

Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.

3. Check for updates

To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad.

4. Delete the app, then redownload it

Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed.

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

You'll want to reach out to the app developer directly for additional guidance: How to contact an app developer - Apple Support

Take care!

Hello huangky,

For difficulties with Safari you'll want to take the steps below:

Connect to a different network

Try to load a website, like www.apple.com, using cellular data. If you don't have cellular data, connect to a different Wi-Fi network and then load the website.

If you're using a VPN (Virtual Private Network), check your VPN settings. If you have a VPN turned on, some apps or websites might block content from loading.

Restart your device

Turn off your device and turn it on again.

• Restart your iPhone 

• Restart your iPad 

• Restart your iPod touch

Clear website data

You can clear website data occasionally to improve Safari performance.

1. Go to Settings > Safari.

2. Tap Clear History and Website Data.

3. Tap Clear History and Data to confirm.

Turn on JavaScript

Turn on JavaScript if it's not already on.

1. Go to Settings > Safari > Advanced.

2. Find the JavaScript feature.

3. Tap the button to turn on JavaScript.

You can also find those steps in this resource: If Safari isn't loading websites or quits on your iPhone, iPad, or iPod touch - Apple Support

Should that still persist, do you experience the same behavior with any other websites?

If this is happening exclusively with YouTube, you'll want to reach out to them: YouTube Help They'd be in the best position to assist with troubleshooting their particular website.

Take care.