Note: Reactheme all products have similar header and footer options. So, You can see this video although it is another product header and footer video.
Check this video on how you can edit the header and footer
First, from admin you need to select Header Post Type
Then you will get All header Layouts here and you can make your new header as well.
Then select any header you want to edit and just click to edit with elemtentor
Then you can easily add site logo, menu and as like you want using elementor. You can add anything using drag & drop system