How to get videos with react native camera roll

So far my code can save photos and videos to my device, and I have been able to get my camera roll saved photos to show on modal when I press an icon. But my main focus now is to get my camera roll saved videos to show on the modal instead of photos, and I have not been able to get it, please I need help on how to achieve it.

setIndex = (index) => {
      if (index === this.state.index) {
          index = null
      }
      this.setState({ index })
  }

  getPhotos = () => {
      CameraRoll.getPhotos({
          first: 20,
          groupTypes: 'Album',
          groupName: 'myCameraApp Photos',
          assetType: 'Photos'
      })
      .then(r => this.setState({ photos: r.edges}))
  }

//   getVideos = () => {
//     CameraRoll.getVideos({
//         first: 20,
//         groupTypes: 'Album',
//         groupName: 'myCameraApp Videos',
//         assetType: 'Videos'
//     })
//     .then(r => this.setState({ videos: r.edges}))
// }

  toggleModal = () => {
    this.setState({ modalVisible: !this.state.modalVisible})
}


  share = () => {
      const image = this.state.photos[this.state.index].node.image.uri
      RNFetchBlob.fs.readFile(image, 'base64')
      .then((data) => {
        let shareOptions = {
          title: "React Native Share Example",
          message: "Check out this photo!",
          url: `data:image/jpg;base64,${data}`,
          subject: "Check out this photo!"
        };
  
        Share.open(shareOptions)
          .then((res) => console.log('res:', res))
          .catch(err => console.log('err', err))
      })
    }

    // shareVideos = () => {
    //   const video = this.state.videos[this.state.index].node.video.uri
    //   RNFetchBlob.fs.readFile(video, 'base64')
    //   .then((data) => {
    //     let shareOptions = {
    //       title: "React Native Share Example",
    //       message: "Check out this photo!",
    //       url: `data:video/mp4;base64,${data}`,
    //       subject: "Check out this video!"
    //     };
  
    //     Share.open(shareOptions)
    //       .then((res) => console.log('res:', res))
    //       .catch(err => console.log('err', err))
    //   })
    // }

  render() {
    return (
      <View style={styles.container}>
          <RNCamera
            ref = {ref=>{
                this.camera=ref;
            }}
            style={styles.preview}
            flashMode={this.state.flashon}
            type={this.state.backCamera ? RNCamera.Constants.Type.back : RNCamera.Constants.Type.front} 
            captureAudio={this.state.captureAudio}
            androidCameraPermissionOptions={{
              title: 'myCameraApp needs ermission to use camera',
              message: 'We need your permission to use your camera',
              buttonPositive: 'Ok',
              buttonNegative: 'Cancel',
            }}
          >
              {
                ({ camera, status, androidRecordAudioPermissionOptions }) => {
                  if (status !== 'READY') return <PendingView />

                  return (
                    <View style={styles.action}>
                         <View style={{ flexDirection: 'row', justifyContent: 'space-between', paddingHorizontal: 20, marginBottom: 15, alignItems: 'flex-end' }}>
                            <TouchableOpacity  onPress={this.toggleTorch.bind(this)}>
                                    { this.state.flashon == RNCamera.Constants.FlashMode.off? (
                                            <Icon
                                                name="md-flash-off"
                                                color="black"
                                                size={30} 
                                            />
                                        ) : (
                                            <Icon
                                                name="md-flash"
                                                color="white"
                                                size={30} 
                                            />
                                        )
                                    }
                                </TouchableOpacity>
                                <View style={{ alignItems: 'center' }}>
                                    <TouchableOpacity onPress={this.takePicture} style={styles.captureBtn} />
                                </View>
                                <View style={{ alignItems: 'center' }}>
                                    <TouchableOpacity onPress={this.recordVideo} style={styles.captureVideoBtn}>
                                      {
                                        this.state.recording ?
                                      (<Text>{this.secondsToMMSS(this.state.seconds)}</Text>) :
                                      (null)
                                      }
                                    </TouchableOpacity>
                                </View>

                                <TouchableOpacity
                                  onPress={this.reverseCamera}
                                  >
                                      <Icon
                                        name="md-reverse-camera"
                                        color="white"
                                        size={30} 
                                      />

                                  </TouchableOpacity>

                          </View>
                    </View>
                  )
                }
              }
              
          </RNCamera>

          <TouchableOpacity 
            style={styles.photoGalleryIcon}
            onPress={() => { this.toggleModal(); this.getPhotos() }}
          >
                <Image 
                  source={require('../images/photoGalleryIcon.png')}
                />
            </TouchableOpacity>

            <Modal
              animationType={"slide"}
              transparent={false}
              visible={this.state.modalVisible}
              onRequestClose={() => console.log('closed')}
            >
              <View style={styles.modalContainer}>
                <Button
                  title='Close'
                  onPress={this.toggleModal}
                />
                <ScrollView
                  contentContainerStyle={styles.scrollView}>
                  {
                    this.state.photos.map((p, i) => {
                      const isSelected = i === this.state.index;
                      const divide = isSelected && this.share === true ? 1 : 3;
                      return (
                        <TouchableHighlight
                          style={{opacity: i === this.state.index ? 0.5 : 1}}
                          key={i}
                          underlayColor='transparent'
                          onPress={() => this.setIndex(i)}
                        >
                          <Image
                            style={{
                              width: width/divide,
                              height: width/divide
                            }}
                            source={{uri: p.node.image.uri}}
                          />
                        </TouchableHighlight>
                      )
                    })
                  }
                </ScrollView>
                {
                  this.state.index !== null  && (
                    <View style={styles.shareButton}>
                      <Button
                          title='Share'
                          onPress={this.share}
                        />
                    </View>
                  )
                }
              </View>
            </Modal>