Right in the comments below Musk's announcement tweet, someone uploaded the full version of Shrek the Third, which was later taken down.
Twitter Blue subscribers, who now pay $8/month for it, are allowed to upload videos of up to two hours at 1080p resolution that must have an 8GB file size or smaller. Also, longer two-hour videos can only be uploaded from the web or iOS.
Twitter Blue is now available for users around the world. Its subscribers get a blue verification checkmark, the ability to edit tweets, new features that the company tests in Early Access, and more.