I'll see what I can do!
1:
I was able to find some information that naval radar incorporates Doppler radar.
From
https://www.militaryaerospace.com/sensors/article/14174156/shipboard-radar-missiledefense
External Quote:
The AN/SPQ-9B is an X-Band pulse-Doppler frequency-agile radar that scans out to the horizon and performs simultaneous and automatic air and surface target detection and tracking of low flying anti-ship cruise missiles, surface threats, low-and-slow-flying aircraft, unmanned aerial vehicles (UAVs), and helicopters.
However, I have not found evidence that drones exhibit the capability to maneuver in the way you suggest happens in the video, or evidence that they avoid Doppler radar in the way you describe.
Here is where in the Wikipedia article that statement is drawn from.
From:
https://en.wikipedia.org/wiki/Doppler_radar
External Quote:
Low-flying military plane with countermeasure alert for hostile radar track acquisition can turn perpendicular to the hostile radar to nullify its Doppler frequency, which usually breaks the lock and drives the radar off by hiding against the ground return which is much larger.
Wikipedia mentions such a plane is using an "alert for hostile radar track acquisition". Is there evidence that military drones have the same or a similar capability? Sources with links will bolster your hypothesis.
2:
Is there evidence for drone testing off San Clemente island? The Drive article on the July Drone sightings pointed out the investigation into them went quite high up the chain of command, to people who potentially would have knowledge on San Clemente drone testing.
From
https://www.thedrive.com/the-war-zo...us-drones-off-california-over-numerous-nights
External Quote:
To be sure,
San Clemente Island and nearby training area FLETA HOT are hosts to a bevy of testing, which can include classified programs. Is it possible that the drones were operated by the military itself in an errant test of some kind?
If so, the incursions continued after a concerted investigation that reached the highest level of the Navy hierarchy. It also appears that no UAV activity was scheduled by FASFAC San Diego during July 14th. On the other hand, it is a general area where extremely
strange things have occurred in the past.
3:
The maneuvering of the Omaha happens before the video was taken, not after.
The maneuvering is before the gap in AIS data begins.
I hope that is helpful to your hypothesis!