To use Cosmo Theme just like in our demo version you only need 2 extra plugins Instagram and EasyForms. Though you can add any additional plugin if you like – just keep in mind that we don’t guarantee a proper functioning with other plugins. You have to check the compatibility yourself or you can reach out to us and ask.
All other stuff like Profile widget, Youtube widget etc. are already incorporated into the theme and you should be able to see them right after installation at the widgets area.