gistfile1.txt

1 - Create a folder called module in the child theme folder.
2 - Duplicate the includes/builder/module/FilterablePortfolio.php file of the parent theme into this new created folder of the child theme.
3 - Open the FilterablePortfolio.php file in child theme and change the name of the class ET_Builder_Module_Filterable_Portfolio (line 3) to something else (ex: Cu_ET_Builder_Module_Filterable_Portfolio). 
4 - Do the same with the last line: new Cu_ET_Builder_Module_Filterable_Portfolio;
5 - Add this code in the functions.php file of the child theme:

function filterable_module_setup() { 
  get_template_part( 'module/FilterablePortfolio' );   remove_shortcode( 'et_pb_filterable_portfolio' ); 
  add_shortcode( 'et_pb_filterable_portfolio', array( new Cu_ET_Builder_Module_Filterable_Portfolio(), '_shortcode_callback' ) ); 
}
add_action( 'et_builder_ready', 'filterable_module_setup' );
6 - Now you can modify the video module from child theme as needed.