我以前见过这个问题，但通过导入/导出花括号解决它的解决方案似乎不是根本原因。
我可以尝试添加一个功能组件到我的网页React.js，该组件将包括从Expo导入的视频。它似乎导致了一个错误，我觉得它是与视频类坐在VideoInstance导致的错误，但不确定。

阶段2.js页面

import React from 'react'
import { View, StyleSheet} from 'react-native'
import { VideoInstance } from '../components/Videos'

export default function Phase2() {
  return (
    <View style={styles.container}>
      <VideoInstance/>
    </View>
  )
}

const styles = StyleSheet.create(
  {
    container: {
      flex:1,
      backgroundColor: 'red',
    }
  }
)

Video.js功能组件（错误在于视频，我认为运行时没有该组件且可触摸）

import React from 'react'
import { View, Text, StyleSheet, TouchableWithoutFeedback } from 'react-native'
import Video from 'expo-av'

export const VideoInstance = () => {
  const video = React.useRef(null);
  const [status, setStatus] = React.useState({})

  const onPlayPausePress = () => {
    status.isPlaying ? video.current.pauseAsync() : video.current.playAsync()
  }

  return (
    <View>
        <TouchableWithoutFeedback onPress={onPlayPausePress}>
        <Video
          ref={video}
          style={styles.video}
          source={{uri:"https://d23dyxeqlo5psv.cloudfront.net/big_buck_bunny.mp4"}}
          resizeMode='contain'
          useNativeControls={false}
          isLooping
          shouldPlay
          onPlaybackStatusUpdate={setStatus}
          />
          </TouchableWithoutFeedback>  
      </View>
  )
}

const styles = StyleSheet.create(
  {
    container: {
      flex:1,
      backgroundColor: 'red',
    },
    video: {
      flex: 1,
      alignSelf: 'stretch'
    }
  }
)

完整错误消息：****

Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite 
components) but got: %s.%s%s, undefined,  You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

Check the render method of `VideoInstance`., 
    in VideoInstance (created by Phase2)

我想让视频在Phase 2页面上呈现。但是它不能呈现。我试着把VideoInstance的代码直接放在Phase 2函数中，它工作了，所以问题一定是试图把它放进去，只是不确定是什么...