Now we understand correctly.
The problem is caused by ajax shop setting.
In the sample video, when you click the add to cart button, you will redirect to the cart page and then show the notification.
But in our lorada theme, when you click the add to cart, you will not redirect to the cart page, because of ajax cart.
You can't see the notification after ajax add to cart.
So in our lorada theme, when customer add the product to cart, right mini cart box will be shown automatically.
Please enable "View Mini Cart Box After Ajax Cart" option in admin->theme options->header->shopping cart element like screenshot.
Then, you can see the added product in the minicart box, after add to cart.
If you have any questions, please let us know again without hesitation.
Best Regards, C-Themes