Максим

<div id="inputs">
   <input class="my-input" type="text" name="name_1">
   <input class="my-input" type="text" name="name_2">
   <input class="my-input" type="text" name="name_3">
   ...
   <input class="my-input" type="text" name="name_N">
</div>

var id = null;
$('#inputs').on('click','.my-input',function() {
    id = $(this).val();
});

<?=$form->field($model_video_form,'name',['id'=>'field_id'])->label('..')?>