image grid doest work like example…

Hi!
I have installed the plugin but i cant config the gird like the example you give before download. Please i need some answer.
I need the bottom of the gird, horizontally aligned with differents image sizes. (like Pinterest but at bottom aligned) like this video you show in the description https://www.youtube.com/watch?v=CUOywQAadzU

this is de link http://laresistencia.es/clientes/kmzero/

Thanks!