Mopub exchange video

Added video support for mopub exchange, added a log message if we get a mraid message to say we don't support the fields in there
In pseudocode:
If min > max then
  min = max
else
   throw exception

That isn't correct logic. The negation of min > max is min <= max, which is correct. Also the exception addresses the case handled in the if block, where you test for min > max.