WhatsApp videos are not viewable in iPhone 6s I got a video in WhatsApp from someone with an Android phone. When I open the video I  can hear the the audio, but nothing is visible; it's just a blank screen with audio from the recording. 

I forwarded the same video to my friend who has an  iPhone 7 and he is able to view (and hear) the video. 

Does anyone know what the problem is and how to fix?  I am using an iPhone 6s.
Try the free VLC video app, it's available for iOS.