Two PCs using the same port NAT configuration

[fromaron]

First the situation:
I have two different PCs that require the same UDP 554 port to be open so I can watch my IPTV stream without constant buffering. I don't use both PCs at the same time for IPTV.
I configured my router NAT for port forwarding to one of them and it works. As I can't configure two local IPs for the same port forwarding I use the second one in DMZ. I really don't like the DMZ thing so the question is:
If I just use port triggering in the router without any port forwarding, should router NAT allow the UDP packets via the triggered port 554 to the local PC the same way as port forwarding would?

[autotuner]

I don't think so. Port triggering is really just like dynamic port forwarding. Each PC (assuming you had only one ISP IP address) would still need a unique port.
Maybe a Media Hub? Port forward all to it and the PCs feed off that?

[fromaron]

Each PC (assuming you had only one ISP IP address) would still need a unique port.
Maybe a Media Hub? Port forward all to it and the PCs feed off that?

Yes, I couldn't get UDP packets flowing by just using the port triggering. Media hub is a good idea I thought about before.
I actually managed to achieve good results by using 554 port on one PC and 7000 on the other. That works nicely, both PCs get their stream without problems.