Hi @tiago_magano,
If I understand correctly, the new node you’ve added is ONLY running kaltura-nginx, correct? Because, if kaltura-nginx runs on the same machine as the Apache, and Apache is listening on post 80, the Nginx cannot listen on that port as well.
In the configuration you posted, I see the Nginx server name is qld-vod.escolavirtual.pt but the kalapi endpoint is ALSO qld-media.escolavirtual.pt. This cannot work. kalapi should point to the Kaltura Server endpoint [i.e: the Apache node[s] running the server PHP code or a load balancer behind which these nodes reside].
Please provide a more detailed overview of your topology [again, from your description, I assume that you’ve got a cluster and not just an all in one instance].
Also, provide the output for:
mysql> select id,url,host_name from delivery_profile where id in (1001,1002,1003);