if( !function_exists( 'marstheme_video_pagination' ) ){
    function marstheme_video_pagination( $post_id ) {
        if ( get_previous_post_link() || get_next_post_link() ):
        ?>
            <div class="nav-links">
                <div class="row">
                    <div class="col-md-6 col-xs-12 previous-post">
                        <?php if( get_previous_post_link() ):?>
                            <?php previous_post_link( '<h4>'.__('<i class="fa fa-angle-left"></i> Previous %link', 'mars').'</h4>', '%title' );?>
                        <?php endif;?>
                    </div>
                    <div class="col-md-6 col-xs-12 next-post">
                        <?php if( get_next_post_link() ):?>
                            <?php next_post_link( '<h4>'.__('%link Next <i class="fa fa-angle-right"></i>', 'mars').'</h4>', '%title' );?>
                        <?php endif;?>
                    </div>
                </div>
            </div>
        <?php endif;
    }
    add_action( 'mediapress_media_pagination' , 'marstheme_video_pagination', 10, 1);
}