TL;DR: doctor uses a method called hydrodissection on Ukrainian war amputees to alleviate post-amputation pain and phantom pain.
Apparently it’s a simple and promising method that has potential for amputees the world over.
More about hydrodissection here:
The Youtube channel is called “WGN9 News - News from Chicagoland & beyond”. So the good doctor is a Chicagoan I assume.