OpenAI’s Sora app for AI videos is a viral hit, despite being invite-only for now and limited to users in the U.S. and Canada at launch. On its first day, Sora saw 56,000 downloads, and is now ranked as the No. 3 Top Overall app on the U.S. App Store, according to new data from app intelligence provider Appfigures. The firm estimates Sora’s iOS app pulled in a total of 164,000 installs during its first two days, September 30th and October 1st. The day-one figure puts Sora’s debut ahead of the pe...