How to override template for view mode of a entity within a module?
I did this using hook_process_HOOK($variables) for nodes view mode tpls :

function view_mode_tpl_preprocess_node(&amp;$vars) {
  $vars['theme_hook_suggestions'][] = 'node__' . $vars['node']-&gt;type . '__' .$vars['view_mode'];
}


hope this will help you.