Sopa Images | Lightrocket | Getty ImagesOpenAI now has two of the top three free apps in Apple's App Store, and its new video generation app Sora has snagged the coveted No. 1 spot.The artificial intelligence startup launched Sora on Tuesday, and it allows users to generate short-form AI videos, remix videos created by other users and post them to a shared feed. Sora is only available on iOS devices and is invite-based, which means users need a code to access it.Despite these restrictions, Sora ...