Yiffy doesnt work for me , I get the same error when using Spor**dev*l , after clicking on movie a box comes up saying( External Player Active , Click OK When Playback Has Ended ) but Spor**dev*l you can change settings to use different player (although not Avia)Because chromescast only supports CERTAIN FILE TYPES. I have found kinkins TV online and lambdas YIFY work 100%
There is no such option in Yiffy