If you are viewing Viki on your TV with your iOS device via screen mirroring or using a HDMI cable, some videos might run with a black screen and audio + subtitles in the background.
This is something that we're unable to control for now until Apple makes some changes. To circumvent this issue in the meanwhile, we recommend the following options:
1) Use Chromecast
2) Use Android /Fire TV devices to stream to the TV
3) Use Airplay:
- Go to iTunes Store
- Load any trailer for a movie
- Click on the AirPlay icon and select the Apple TV device.
- Go back to Viki and play the desired video'