Responsive grid with social embed + various content / can't figure it out

Hi guys,

Would anyone have an idea of how the grid on this website was built, integrating social media posts (different sources; Instagram, Twitter, website) as well as videos, text iitems, etc.:

I’ve tried to create something similar using CMS (Collection Lists) but the styling only allows for one type of content to be embedded, which is not the case on the sample website (link).

Thanks for any help or ideas :smiley: