I solved
i change this in function save in ytc_content.php in line 560, i change the permission only
function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=0777) {
if( $image_type == IMAGETYPE_JPEG ) {
imagejpeg($this->image,$filename,$compression);
} elseif( $image_type == IMAGETYPE_GIF ) {
imagegif($this->image,$filename);
} elseif( $image_type == IMAGETYPE_PNG ) {
imagepng($this->image,$filename);
}
if( $permissions != null) {
chmod($filename,$permissions);
}else{
chmod($filename,$permissions);
}
}