Just changed variation to error,icon to 'fa-ban' and title.

$('#start').on('click',function(){
    $.amaran({
        'theme'     :'awesome error',
        'content'   :{
            title:'Download Canceled!',
            message:'1.4 GB',
            info:'my_birthday.mp4',
            icon:'fa fa-ban'
        },
        'position'  :'bottom right',
        'outEffect' :'slideBottom'
    });
});