Right, I have to open this thread again.
Last 3 days I had an O2 advert that is not working. All that comes up is just black.
I have tried in few browser with exactly same problem.
Therefore, for now, that video booster is no working for me as this O2 advert keep coming.
Iframe link is:
https://www.supersonicads.com/delive...fb_bmpos%3D2_0

I have check everything and nothing wrong at my side, and sometimes I'm lucky that another advert is coming up, but usual this O2 advert comes after that again

Very annoying this

Also some times this advert from "Save Children" about Syria don't give you any booster.
After 10 attempts it did finally gave me 1 booster, but next day I have the same issue again