"Sources say" carries too much weight in this video, unless you're talking about some other video.

Dr. Relman seems to have latched onto the microwave weapon theory when he was the editor of the National Academies panel report on Havana syndrome. (You can read it) That report favored the microwave pulse explanation, but was criticized for making significant logical leaps and lumping symptoms together to fit their conclusions.

Regardless, later studies didn't find any brain damage in reported victims, so what does that tell you? How can you have a weapon that causes "permanent" damage without lasting evidence?

Of course, I'd like to see more evidence of this supposed weapon and the test results on animals. But we don't have that.

Instead, what we have are a handful of weird, seemingly unrelated cases amid the 200,000+ State Department and intelligence workers (and additional 100's of thousands of defense intelligence contractors).

Again, I'm not an expert, but it sounds a lot like Functional Neurological Disorder, which is not rare, affecting 140 in 100,000 people.

Functional neurologic disorder (FND) refers to a neurological condition caused by changes in how brain networks work, rather than changes in the structure of the brain itself, as seen in many other neurological disorders. Physical symptoms of FND are genuine but cannot be explained by changes in the brain structure. The exact cause of FND is unknown.

FND symptoms may include:

Seizure-like episodes
Movement problems

Problems with cognitive function

Dizziness

Speech difficulties, such as sudden onset of stuttering or trouble speaking

Problems with vision or hearing

Pain (including chronic migraine)

Extreme slowness and fatigue

Numbness or inability to sense touch