Add this code in child theme functions.php file or wplms customizer/wplms_customizer.php file :
add_filter('vibe_unit_duration_parameter','wplms_custom_unit_parameter');
function wplms_custom_unit_parameter($return){
$return = 1; //set to 1 second.
return $return;
}
add_filter('wplms_curriculum_time_filter','wplms_custom_unit_curriculum_time_filter',10,2);
function wplms_custom_unit_curriculum_time_filter($html,$min){
$minutes=0;
$seconds=0;
$unit_duration_parameter = apply_filters('vibe_unit_duration_parameter',60);
if($unit_duration_parameter == 1){ // Checks if unit duration parameter is set in seconds
if($min > 60){
$minutes = intval($min/60);
$seconds = $min - $minutes*60;
}else{
$seconds = $min;
}
$html = '<span><i class="icon-clock"></i> '.((isset($minutes) && $minutes)?$minutes.__(' Minutes','vibe'):'').' '.$seconds.' '.__('seconds','vibe').'</span><b>'.((isset($hours) && $hours)?sprintf('%02d',$hours):"00").':'.sprintf('%02d', $minutes).'</b>';
}
return $html;
}