Summarize the following:
Tap the App Store app icon, which resembles a white "A" on a light-blue background. This option is in the lower-right corner of the screen. It's the grey text box with "App Store" in it at the top of the page. Type in vlc, then tap the blue Search button in the lower-right side of the keyboard. Scroll down until you find this heading next to VLC's orange traffic cone icon. It's to the right of the "VLC for Mobile" heading. If you've downloaded VLC before, you'll tap {"smallUrl":"https:\/\/www.wikihow.com\/images\/e\/ea\/Iphoneappstoredownloadbutton.png","bigUrl":"\/images\/thumb\/e\/ea\/Iphoneappstoredownloadbutton.png\/30px-Iphoneappstoredownloadbutton.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an iPhone icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} to the right of this heading. Doing so will allow VLC to begin installing onto your iPhone. You can open VLC immediately after it downloads by tapping OPEN in the App Store.

Summary:
Open your iPhone's  App Store. Tap Search. Tap the search bar. Search for VLC. Find the "VLC for Mobile" heading. Tap GET. Enter your Touch ID or Apple ID password when prompted.