Seek to the beginning on replay

The video.js SWF no longer seeks back to the beginning automatically. Instead, check whether the video has ended on play and seek back to the beginning if necessary.

src/js/tech/flash.js

@@ -113,6 +113,9 @@ class Flash extends Tech {
    * @method play
    */
   play() {
+    if (this.ended()) {
+      this.setCurrentTime(0);
+    }
     this.el_.vjs_play();
   }
 

test/unit/tech/flash.test.js

@@ -166,6 +166,28 @@ test('seekable', function() {
   equal(result.length, mockFlash.duration_, 'seekable is empty with a zero duration');
 });
 
+test('play after ended seeks to the beginning', function() {
+  let plays = 0, seeks = [];
+
+  Flash.prototype.play.call({
+    el_: {
+      vjs_play() {
+        plays++;
+      }
+    },
+    ended() {
+      return true;
+    },
+    setCurrentTime(time) {
+      seeks.push(time);
+    }
+  });
+
+  equal(plays, 1, 'called play on the SWF');
+  equal(seeks.length, 1, 'seeked on play');
+  equal(seeks[0], 0, 'seeked to the beginning');
+});
+
 // fake out the <object> interaction but leave all the other logic intact
 class MockFlash extends Flash {
   constructor() {