Firefox plugins - uMatrix vs Policeman

I've used both plugins (independently of each other) off and on the last year or so and I'm trying to understand the differences between them; specifically how "scopes" work.

In Policeman, there are a number of sites under Origin. I have the impression that if site A loads site Y, site B loads site Y, and site Y loads site Z, if I configure rules for site Y about site Z they apply when sites A and B load site Y.

In uMatrix the blue box specifies scope, which appears to be global, site.com, specific.site.com, and the like. This seems different from how Policeman works.

My common use case example is youtube - I want to configure everything once for youtube (site Y) relative to ytimg, googlevideo (sites Z) and the like. Can both extensions handle this?

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