expo-av Video not showing up on iOS but working on Android

Question

Video and video player is loading fine on Android, but on iOS nothing is rendered. I'm using Video from expo-av.

I tried adding height and width to the view , tried

 source={{ uri: post.videoURL + ".mp4" }}

as these solved the problem in other SO posts, but they didn't work for me. What else would you suggest?

let videoPlayerRef = useRef(null);
...

            <View>
              <Video
                ref={videoPlayerRef}
                style={{
                  width: 350,
                  height: 200,
                }}
                resizeMode={Video.RESIZE_MODE_COVER}
                shouldPlay={true}
                useNativeControls
                isLooping={false}
                usePoster
                rate={1.0}
                volume={1.0}
                isMuted={false}
                onPlaybackStatusUpdate={(videoStatus) =>
                  setVideoStatus(() => videoStatus)
                }
                source={{ uri: post.videoURL }}
              />
            </View>

Answer 1

The problem was video format. Check what video format is uploaded/ played, guys. The video I was trying to play on iOS was neither of these: .m4v, .mp4, and .mov . Also the videos I was trying to upload in my app were .mov and that also caused problems - they didn't upload