To be honest I probably didn’t leave the video ads up long enough to get a good idea of what the real eCPM was. I know that I was making less revenue/day with Vungle. Even if eCPM were higher I was still showing only 30% the amount of impressions as full screen ads (can’t show as many video ads as full screen ads because that would be annoying) so its eCPM had to be greater than 3x the full screen ad eCPM just to break even on revenue. My thought was that if Vungle eCPM was that low to begin with, I doubt it would have become 3x the full screen ad eCPM so I just decided not to use it.
Depending on where you place it in your game though it may have better results than what I got.