The Epix summer free preview on demand has a series called Britannia but episode one season one is only the preview and not the whole episode and it won't play. The other episodes play just not the first one.
Solved issue: Went into On Demand under Britania episode 1 season 1. Clicked onto Watch Options. Scrolled right 3 or 4 times on: Epix < Free HD > You will notice that in the top left hand corner the time will began to change from episode 1, 1 min 27 sec to episode 1, 73 min. Press enter when it reaches episode 1, 73 min and it will work! This might also work on other series when it glitches out.