There is a video taken from an F/A-18 commonly run on the TV shows. What they cut out and don't discuss is the digital readout on the right side of the view screen. The common description is a super fast UAP doing fantastic speeds and impossible zig-zag maneuvers close to the water.
If you know how to read the digital info on the right hand side of the screen (that the TV people love to crop out):
The F/A-18 is cruising at ~20k feet and around 550 knots.
The camera pod was looking slightly aft at about 8 o'clock.
The UAP was traveling in the opposite direction of the F/A-18.
The readout showed the UAP was at 17k feet going about 350 knots, NOT just above the water and going super fast. It appears to be fast against the waves unless you know it's nowhere near the waves and it's an illusion.
The zig-zag movements just happened to coincide with the pod operator switching between IR and daylight and changing resolution and zoom.. The camera would go off-center and have to recenter on the target. The target UAP wasn't zig-zagging at all, it was going straight.
The oval spot identified as a UAP is strikingly similar to that of a twin engine jet going away from seen through an IR camera - two side by side exhausts as seen in many military aircraft.
Lack of detailed information can lead even well educated and intelligent observers to make an error because what they think/perceive they are seeing isn't what they're really seeing.
So just because I don't know what it is, doesn't mean it's aliens.