Resolving Video Playback Issues
Occasionally the default video player may not support the video format used by a particular podcast publisher. As an alternative, downloaded videos can also be played in any Android application that supports video playback (popular choices are MX Video Player or VPlayer).
If the external player works for your needs, you can configure BeyondPod to use it instead of the default player in: BeyondPod Settings > Player Settings > Default Audio/Video Player > Use External Video.