Adbreak RPM

Hello all
I have an viral video Usa audience on Facebook monetizet with adbreak video is 6 min long and with autoad placed , good watch time but the problem is with rpm first day it was 1.10$ , 2nd day 0.77$ and now 0.44$ anyone can give me a solution

This depends on the video audience,some videos gets reach on usa and some in other countries.

I have usa reach