Fix playing of video Theora files

scene/gui/video_stream_player.cpp

@@ -158,6 +158,7 @@ void VideoStreamPlayer::_notification(int p_notification) {
 			playback->update(delta); // playback->is_playing() returns false in the last video frame
 
 			if (!playback->is_playing()) {
+				resampler.flush();
 				if (loop) {
 					play();
 					return;