Hi,
Sorry my mistake, the code must be:
<div class="hikashop_tabs_content" id="hikashop_show_tabular_NEWTABNAME">
...
</div>
I forgot a replacement. And you can place it after any other div with the class "hikashop_tabs_content".
To have different videos depending on the product, the easiest way is to create a new custom field in the "product" table via the menu Display > Custom fields. Then in backend for each product set his video url/path.
And in the view edition, in the tab set a path containing the url set in the custom field.
To get the content of a custom field you have to use code like:
$this->element->CUSTOMFIELDNAME