版本

1.x
2.x 的版本Web可行，在iOS中Canvas层不渲染，还未找到原因

原理

无论在哪个环境下，Cocos的默认实现都是把视频层作为Canvas的一个子视图。实现Canvas在视频上方的原理就是让两者同层

Web

iOS

在 AppController.h 添加

@property(nonatomic, readonly) UIView* videoView;

在 AppController.mm 修改

// Add super view to make canvas on top of video player
_viewController.view.tag = 3;
UIViewController* uiVC = [[UIViewController alloc] initWithNibName:nil bundle:nil];
uiVC.view.frame = [UIScreen mainScreen].bounds;
_videoView = [[UIView alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
_videoView.tag = 1;           //设置tag以便之后把Video层取出来~

[uiVC.view addSubview:_videoView];
[uiVC.view addSubview:_viewController.view];
    
// Set RootViewController to window
if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
{
    // warning: addSubView doesn't work on iOS6
    [window addSubview: uiVC.view];
}
else
{
    // use this method on ios6
    [window setRootViewController:uiVC];
}

在 UIVideoPlayer-ios.mm 修改

[[eaglview.superview viewWithTag:1] addSubview:volumeView];
[[eaglview.superview viewWithTag:1] addSubview:self.moviePlayer.view];