Fix getInternalPlayer method

Since the refactor, the internal player is now deeper in the object tree of the various player objects

README.md

@@ -212,7 +212,7 @@ Method | Description
 `seekTo(amount)` | Seek to the given number of seconds, or fraction if `amount` is between `0` and `1`
 `getCurrentTime()` | Returns the number of seconds that has been played<br />&nbsp; ◦ &nbsp;Returns `null` if duration is unavailable
 `getDuration()` | Returns the duration (in seconds) of the currently playing media<br />&nbsp; ◦ &nbsp;Returns `null` if duration is unavailable
-`getInternalPlayer()` | Returns the internal player of whatever is currently playing<br />&nbsp; ◦ &nbsp;eg the [YouTube player instance](https://developers.google.com/youtube/iframe_api_reference#Loading_a_Video_Player), or the [`<video>`](https://developer.mozilla.org/en/docs/Web/HTML/Element/video) element when playing a video file<br />&nbsp; ◦ &nbsp;Use `getInternalPlayer('hls')` to get the [hls.js](https://github.com/video-dev/hls.js) player<br />&nbsp; ◦ &nbsp;Use `getInternalPlayer('dash')` to get the [dash.js](https://github.com/Dash-Industry-Forum/dash.js) player
+`getInternalPlayer()` | Returns the internal player of whatever is currently playing<br />&nbsp; ◦ &nbsp;eg the [YouTube player instance](https://developers.google.com/youtube/iframe_api_reference#Loading_a_Video_Player), or the [`<video>`](https://developer.mozilla.org/en/docs/Web/HTML/Element/video) element when playing a video file<br />&nbsp; ◦ &nbsp;Use `getInternalPlayer('hls')` to get the [hls.js](https://github.com/video-dev/hls.js) player<br />&nbsp; ◦ &nbsp;Use `getInternalPlayer('dash')` to get the [dash.js](https://github.com/Dash-Industry-Forum/dash.js) player<br />&nbsp; ◦ &nbsp;Returns `null` if the internal player is unavailable
 
 ### Supported media
 

src/Player.js

@@ -45,6 +45,10 @@ export default class Player extends Component {
       this.player.setPlaybackRate(nextProps.playbackRate)
     }
   }
+  getDuration () {
+    if (!this.isReady) return null
+    return this.player.getDuration()
+  }
   getCurrentTime () {
     if (!this.isReady) return null
     return this.player.getCurrentTime()
@@ -53,9 +57,9 @@ export default class Player extends Component {
     if (!this.isReady) return null
     return this.player.getSecondsLoaded()
   }
-  getDuration () {
-    if (!this.isReady) return null
-    return this.player.getDuration()
+  getInternalPlayer = (key) => {
+    if (!this.player) return null
+    return this.player[key]
   }
   seekTo (amount) {
     // When seeking before player is ready, store value and seek later

src/ReactPlayer.js

@@ -37,10 +37,6 @@ export default class ReactPlayer extends Component {
     }
     return false
   }
-  seekTo = fraction => {
-    if (!this.player) return null
-    this.player.seekTo(fraction)
-  }
   getDuration = () => {
     if (!this.player) return null
     return this.player.getDuration()
@@ -51,7 +47,11 @@ export default class ReactPlayer extends Component {
   }
   getInternalPlayer = (key = 'player') => {
     if (!this.player) return null
-    return this.player[key]
+    return this.player.getInternalPlayer(key)
+  }
+  seekTo = fraction => {
+    if (!this.player) return null
+    this.player.seekTo(fraction)
   }
   progress = () => {
     if (this.props.url && this.player && this.player.isReady) {