Unless you've programmed your device to automatically install app updates, such as YouTube, you should check for YouTube updates this time and install them manually if they're available. Aside from adding new features and improving existing ones, upgrades often include bug fixes. Installing the most recent YouTube update, on the other hand, might be the best option, especially if the trouble you're having is the result of bugs. Here's how to see whether YouTube has any new videos:
- Go to the App Store and download the app.
- On your iPhone display, scroll down to the bottom right corner.
- Select Updates from the menu.
- A notice will appear if an update is available. To finish the update download and installation for the selected app, tap the Update button situated directly next to the YouTube app, then follow the onscreen instructions (YouTube).
After that, reset your iPhone and see whether you can now watch YouTube videos on it.