Rob:
I have active 2 campaigns, 1 Static Interstitial and 1 Rewarded Video (see image attacched)
This log when Static Ad comes out:
LOG: 02-11 17:36:27.749: I/Chartboost(30909): DID DISPLAY INTERSTITIAL: Default
This log when Rewarded video CACHE:
02-11 17:36:52.449: I/Chartboost(30909): DID FAIL TO LOAD REWARDED VIDEO: 'Default', Error: NO_AD_FOUND
After I click on button for show rewarded video:
02-11 17:37:07.709: I/Chartboost(30909): DID FAIL TO LOAD REWARDED VIDEO: 'Default', Error: NO_AD_FOUND
To cache Interstitial Videos it takes about 10 seconds (or less), because in my another game
works well on both iOS and Android.
Fill rate of video not is 100%, but i've 2 campaigns setting up (static and video, high and highest ) and when video is unavailable, Static Ad comes out...
I hope it can be useful...