You don’t need google or youtube in this case. Everything was recently explained in this forum with examples.
Add a managed route on the controller:
192.168.1.0/24 via 192.168.192.2
Enable packet forwarding on your office PC as explained here.
Additionally you will need static routes either on your office main router or on the web camera directly:
{homePC subnet} via 192.168.1.2
192.168.192.0/24 via 192.168.1.2