Weird Urlmanager Activity - Maybe Ghosts

I have been developing locally on MAMP with no probelms. Today I added this to my config/main.php to beautify the urls.

'urlManager'=>array(
            'urlFormat'=>'path',
            'rules' => array(
                '' => 'video/player',
            ),
        ),

Keep in mind that everything works fine in my program without this code. After I added the code I go to mysite.com/index.php/site/login and chrome tells me:

"This webpage has a redirect loop
The webpage at mysite.com/index.php/site/login has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer."

Here is my controller code for site/login

    public function actionLogin()
    {
        $this->layout='login';
        $model=new LoginForm;

        // if it is ajax validation request
        if(isset($_POST['ajax']) && $_POST['ajax']==='login-form')
        {
            echo CActiveForm::validate($model);
            Yii::app()->end();
        }

        // collect user input data
        if(isset($_POST['LoginForm']))
        {
            $model->attributes=$_POST['LoginForm'];
            // validate user input and redirect to the previous page if valid
            if($model->validate() && $model->login())
                $this->redirect(Yii::app()->user->returnUrl);
        }
        // display the login form
        $this->render('login',array('model'=>$model));
    }

Anybody have any idea what is causing the problem here when I switch on the UrlManager???