ok. probably the best place to put the js scripts that I sent is includes/modules/pages/product_info . That way they will only load on the product info page.

the module you can set as an override at includes/modules/your_template/additional_images.php

the template can go at includes/templates/your_template/templates/tpl_modules_main_product_image.php

then beyond that I'd need to see a URL to tell you why it is not playing.