Gargoyle Forum

Two suggestions to gargoyle

Web filtering for youtube, whatsapp and others apps.
Open DNS Client for custom lists of domains.

You can "filter" specific websites with
Gargoyle - Firewall - Restrictions - Access Restrictions

You can chose your DNS
Gargoyle - Connection - Basic - Local Network / LAN - DNS Servers - Custom DNS Servers

Does this cover what you are trying to achieve?