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If the super class is not actually observing the key, the app will crash. Checking to see if the super class responds to this selector doesn't solve this issue. react-native-video github issue: https://github.com/react-native-community/react-native-video/issues/1515 Discussion about this particular problem: https://stackoverflow.com/questions/6574714/whats-wrong-with-this-observevalueforkeypathofobjectchangecontext-implement