Army, with respect, you're misunderstanding my point. The Navy wouldn't need to be 'in on it', and the pilots are likely telling the truth too. The pilot in the video you posted seems like a genuine guy. Let's assume the eyewitness accounts and the radar readings are accurate: this still doesn’t get us anywhere. Firstly, as I said earlier, the civilian population assigns a degree of credibility to these guys without really understanding their roles. It sounds impressive stating that he 'protected our skies after 9/11' but it’s got nothing to do with the fact that he wouldn't have a clue about various top-secret military/intelligence operations. You wouldn't require a pilot to fly these things as they couldn't handle the g-force, and you wouldn't have pilots developing the technology required, either.
It's also possible that what they witnessed was the latest Chinese or Russian technology and that's why they were so confused. Forgive how unorganised and rambling this is but let's address probably the most important point first, namely the claim that these things 'break the laws of physics'. They don't. At least, nobody has put forward any evidence demonstrating that, and even that bearded guy in the video you posted stated that 'we understand how these craft work [...] they don't break our laws of physics'. He claims that we lack the fuel and material to build it.
Second point: governments lie, and they demonstrably lie all the time. There has always been a clear incongruity between what states claim to be doing and what they're actually doing. I'm being simplistic here but power structures seek to maintain power. The CIA and other intelligence/defense agencies are arms of the government and operate under plausible deniability. They don't exist to bring you the truth and you can take it as a given that most public statements from them, especially on issues such as military technology, are propagandistic. The fact that the public can regurgitate their propaganda without shame, and focus on issues such as extraterrestrial aliens without paying attention to contemporary foreign policy issues of extreme importance (e.g. the war in Yemen, Iran conflict, etc) is testament to the effectiveness of this indoctrination system.
As to why they would do this, as I stated before, there is an arms race of sorts going on, and it is centered around space. The UK's Aerospace, Defence, Security and Space group had a turnover of £31.8 billion in 2017 and it's still rising. Rolls-Royce has recently been awarded a contract to work alongside the MoD and develop 'hypersonic propulsion systems for increased aircraft performance and capability'. The US funds similar programmes: 'In May, the House Appropriations Committee approved a bill that allocates $22.3 billion to NASA — including $125 million to develop nuclear thermal propulsion tech. Congress also provided $100 million for the same purpose in fiscal year 2019.' You can read about their Falcon Hypersonic Technology Vehicle 2 which reached Mach 20 before crashing into the ocean in 2011.
China (alongside Russia and other states) has spent billions these past few years developing Cold War-era 'molten-salt nuclear' technology to power drones, and it's something that the US had been working on since then, too: 'The US air force built a 2.5-megawatt molten salt reactor in the 1950s as part of a programme to develop nuclear-powered aircraft engines.'
If you click on the link below about spacecraft and nuclear propulsion you can watch the NSC briefing video where the issue is discussed a little:
'Bridenstine also stressed the utility of nuclear thermal propulsion for applications closer to home. For example, the increased power could potentially allow Earth-orbiting craft to steer out of the line of fire of anti-satellite weapons, he said. Such weapons are being developed by both China and Russia, Joseph Maguire, the U.S. acting Director of National Intelligence, said during the NSC meeting today.'
"Both countries view the capability to attack space systems and services as part of their broader efforts to deter or defeat an adversary in combat," Maguire said. "In short, the threat to U.S. and allied space systems continues to grow unabated."
https://www.space.com/nuclear-propulsion-future-spacecraft-nasa-chief.htmlAs demonstrated in another piece I provided earlier, it's well-known that most of this technology is classified and will not be made public for various reasons. It's easy to speculate about a number of these reasons, including possible violations of 'The Outer Space Treaty' and other similar treaties which have been ratified. Or the fact that if other states catch on to the latest drone technology, it may be argued that this could lead to surreptitious nuclear weapons proliferation.
There's scepticism simply for the sake of being a contrarian and then there's actually looking at facts and probability. When one looks at the facts, I don't believe there's anything to suggest alien encounters. If one wishes to take the position that these are indeed alien craft, with advanced technology and an understanding of physics far beyond our comprehension, then they must accept that these aliens are much more intelligent than us. Why, then, would they need to fly around nuclear sites and naval bases to study us, and why would they designate themselves only to these areas? If they had some 'warning' about our nuclear technology then why not make it explicit? Or if they had this advanced technology and simply wanted to observe, then they'd surely have the ability to do this unbeknownst to us. They'd also likely respond to the numerous 'signals' that have been sent into space for decades, and be spotted by the millions of people who stargaze every night and the professional scientists who study planets through massive telescopes and computers. There's simply no evidence at all to accept the alien version of events.