When you watch videos through EngageMe or Smores.tv you are actually being paid every time 3 ads are shown *between* the videos. If there are no ads shown you will not earn anything.
EngageMe & Smores try to always have ads to show users but occasionally they run out of ads for short periods of time. It can last hours/days or even weeks sometimes, though usually it is only 24 - 72 hour periods. Please check back frequently to see if they have managed to get more ads to show you.
Ad fill varies from region to region and by the time of day. Usually the start of a new month will be slow and ad volume will pick up throughout the month.
We have absolutely no control over this so please do not open a support ticket if you are not seeing ads or not getting coins for watching videos.