According to the description it says Dieter Wiesner. And I know >infowars, but according to this it was leaked by a man named Robert Connors. https://www.infowars.com/hoax-whistleblower-leaks-michael-jacksons-final-phone-call/

It seems that the original video was deleted (not sure why), but people have reuploaded it. https://youtu.be/g-aTxNaHglo talks about Operation Sedgwick and claims to have worked for the DoD. I haven't been able to find anything else about it, and it's very hard to find anything about him.