added delegate method for video did finish, moved layer creation to after view displays, rearranged spinner logic, added tests

examples/Videos/Sample/ViewController.m

@@ -11,7 +11,7 @@
 
 #import "ViewController.h"
 
-@interface ViewController()
+@interface ViewController()<ASVideoNodeDelegate>
 @property (nonatomic) ASVideoNode *videoNode;
 @end
 
@@ -51,6 +51,8 @@
 {
   ASVideoNode *nicCageVideo = [[ASVideoNode alloc] init];
   
+  nicCageVideo.delegate = self;
+  
   nicCageVideo.asset = [AVAsset assetWithURL:[NSURL URLWithString:@"http://files.parsetfss.com/8a8a3b0c-619e-4e4d-b1d5-1b5ba9bf2b42/tfss-753fe655-86bb-46da-89b7-aa59c60e49c0-niccage.mp4"]];
   
   nicCageVideo.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/2, [UIScreen mainScreen].bounds.size.height/3, [UIScreen mainScreen].bounds.size.width/2, [UIScreen mainScreen].bounds.size.height/3);
@@ -102,4 +104,9 @@
   return YES;
 }
 
+- (void)videoDidReachEnd:(ASVideoNode *)videoNode
+{
+  //Do something with your video if you so desire.
+}
+
 @end