Woocommerce shortcode amendment problem

Hello everyone,
I want to make amendment to the short code.
[recent_products per_page="100" columns="2"]
I am going to find the root(source code) of the shortcode. But I cannot find it.

My amendment is using video to substitute product image. It is workable in my home page. This code can redirect to my custom php file.
woocommerce_get_template_part( ‘home’, ‘product’ )

However, I cannot add code in a page but only shortcode can do it. So I want to find advise for me. It is also okay to add a custom php in a page, but I don’t know how to do it.

https://wordpress.org/plugins/woocommerce/