The U.S. Navy videos are intriguing but very far from conclusive. And yet they are likely withholding a ton more data that citizens should have access to.
If it's all a cover story for top secret stuff, then it's likely an unnecessary deception. I doubt any U.S. military project is actually safe from Chinese and Russian spies. So all they're doing is increasing the sense of distrust between U.S. citizens and their own government.
Modern people don't want to live in the Cold War secrecy paranoia of the last century. The U.S. military should focus on what really matters and leave that toxic cold war culture behind.