Unfortunately that is no way to template override for this, but you can modify this following files :

1. Easysocial global pagination limit
JoomlaFolder/administrator/components/com_easysocial/includes/easysocial.php
LINE 201 (getLimit method)

JoomlaFolder/administrator/components/com_easysocial/includes/model.php
LINE 82

$systemLimit = $jConfig->getValue( 'list_limit' );

2. Only groups/albums/videos view pagination limit
Videos
JoomlaFolder/components/com_easysocial/views/groups/view.html.php
LINE 173

$options['limit'] = $limit;

Videos
JoomlaFolder/components/com_easysocial/views/videos/view.html.php
LINE 106

$options['limit'] = ES::getLimit('videos_limit', 20);

Albums
JoomlaFolder/administrator/components/com_easysocial/includes/model.php
LINE 82

$systemLimit = $jConfig->getValue( 'list_limit' );