I'm using the renderer from Xandr to play Video ads, and I'm having a little black box before the video appears on the page. Would anyone know why is this happening?
Xandr's Outstream Player options here: https://docs.xandr.com/bundle/monetize_monetize-standard/page/topics/outstream-video-player-options.html
This seems to be an issue with the library provided by Xandr, and it can't be changed. Maybe some parameters can get rid of it. It's happening on Mobile on Android not on desktop.