As I answered here, since WordPress 4.7 Post-Type-Templates are enabled in the WordPress core.
That means that you can create multiple templates for the single post-type view. You create these templates like you would create a normal page template. But you need to add a little more code to these templates:
/*
Template Name: Funerals Video Template
Template Post Type: post, funerals
*/
So you will need to copy your single-funerals.php file, rename it, add some code like the above to the top of the file.
After this, you should see a template select box on the post and funerals edit-screen. (because I specified these 2 post-types with Template Post Type: post, funerals)
Read more about post-type-templates here.