Well, to install iTunes on your computer you don't have to use your iPhone. You just go to the Apple website, and search iTunes, and then you can just download it from there. If you want to sync your iPhone with iTunes to back up your content, you just sign in with your Apple ID (if you have an iPhone you should already have one), then plug in your iPhone and press sync.
You need to connect to to the computer that is authorised for your iPhone and update via iTunes.
Itunes on the iPhone is preinstalled.
To add your iPhone to iTunes, connect it to your computer with a USB cable, open iTunes, and tap Trust on your iPhone if prompted. Your device should then appear in iTunes, where you can sync, back up, or manage your files.
To get iTunes content on your iPhone, you don’t actually install iTunes on the device itself, since iTunes is a desktop app for Windows or Mac. Instead, you use iTunes on your computer to sync or transfer music, videos, apps, and other media to your iPhone. Here’s how: Install iTunes on your computer: Download the latest version from Apple’s website and install it. Connect your iPhone: Use a USB cable to connect your iPhone to the computer. Open iTunes and ensure your device is recognized. Sync content: In iTunes, select your iPhone icon. Navigate through the tabs like Music, Movies, TV Shows, or Books. Check the content you want to sync, then click Apply or Sync. Transfer purchases: To add items already purchased on the iPhone, go to File > Devices > Transfer Purchases from [your iPhone] in iTunes. Use iCloud alternatives: For wireless syncing, you can enable iCloud Music Library, iCloud Photos, or use Finder on Mac (macOS Catalina and later) to sync content without iTunes. Following these steps will get your iTunes media onto your iPhone efficiently, keeping your music, videos, and other purchases up to date.
Using the usb cable it comes with you connect it to your computer and open iTunes. From there click "Update" and it will download and install the newest iPhone OS version for you.
YouTube is a web based video site but iTunes is a computer based music storage and play program you can install on your computer. The only changes to the security settings you will need to do for iTunes are the same for any program you want to add to your computer.
if you can access itunes on your phone you can download music through there ,but if not you can use itunes on your computer , download them through there and synchronise your iphone with your computer.
To sync an iPhone 5, you need iTunes version 11.1 or later. However, for optimal compatibility and features, it’s recommended to use the latest version of iTunes available for your operating system. Ensure your computer meets the system requirements for the version of iTunes you choose to install.
Connect your iPhone/Pod to your computer/laptop, open iTunes and sync your iPhone/Pod. The apps will then appear in your "applications" tab of iTunes.
You Have To Have Access To A Computer Well You Download Itunes Then Sync Your Iphone To There From Buying From The Itunes Store Or You Download Straight From Your Iphone Itunes By Buying Itunes Card Or Having A Credit Card
You go into your iTunes if not install then install. Follow the instructions. And when you are finished, you can sign your iPhone into th your apple itunes account. You can use this for applications songs & videos.
As long as your computer has itunes that is authorised on the same itunes account as your iphone, then it will automatically transfer all your iphone apps onto the computer