title: Can't call function on react-native-video item
body: <p>I'm attempting to display an image and call a Video component onPress. The image displays fine, but I cannot get the video to play the same way I can get an alert to show.</p>
  
  <p>Two images are displayed, if one is clicked then an alert shows. This works fine. If the other image is clicked, then the video should play.</p>
  
  <pre><code>var React = require('react-native');
  var {
    AppRegistry,
    StyleSheet,
    TouchableHighlight,
    Image,
    Text,
    Component,
    AlertIOS,
    View,
  } = React;
  
  var Video = require('react-native-video');
  
  class Mogul extends Component {
    render() {
      return (
        &lt;View style={styles.container}&gt;
          &lt;TouchableHighlight onPress={this.playBroadchurch}&gt;
            &lt;Image
              style={{ height:150, width: 150 }}
              source={{uri: 'http://www.covermesongs.com/wp-content/uploads/2014/05/NotoriousBIG.jpg'}}
            /&gt;
          &lt;/TouchableHighlight&gt;
  
          &lt;TouchableHighlight onPress={this.showAlert}&gt;
            &lt;Image
              style={{ height:150, width: 150 }}
              source={{uri: 'http://www.covermesongs.com/wp-content/uploads/2014/05/NotoriousBIG.jpg'}}
            /&gt;
          &lt;/TouchableHighlight&gt;
        &lt;/View&gt;
      );
    }
  
    playBroadchurch() {
      return (
        &lt;Video source={{uri: "broadchurch"}} // Can be a URL or a local file. 
         rate={1}                   // 0 is paused, 1 is normal. 
         volume={1}                 // 0 is muted, 1 is normal. 
         muted={false}                // Mutes the audio entirely. 
                      // Pauses playback entirely. 
         resizeMode={'contain'}           // Fill the whole screen at aspect ratio. 
         repeat={false}                // Repeat forever. 
         onLoad={this.setDuration}    // Callback when video loads 
         onProgress={this.setTime}    // Callback every ~250ms with currentTime 
         onEnd={this.onEnd}           // Callback when playback finishes 
         style={styles.video} /&gt;
      );
    }
  
    showAlert() {
      AlertIOS.alert('Notorious BIG', 'It was all a DREAM',
        [
          {text: 'Yep', onPress: () =&gt; console.log('Yep Pressed!')},
          {text: 'Nope', onPress: () =&gt; console.log('Nope Pressed!')},
        ]
      )
    }
  
  };
  </code></pre>