Missing plugin for Firefox

[Steven Friedrich]

Missing plugin for Firefox, but I don't know which one.

I tried to view this music video, but I have no idea how to discover what 
format it is.

http://popnewswire.tv/play-the-belle-brigade-the-belle-brigade/10481

I'm running the latest port of Firefox 4.0

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System Name:         laptop2.StevenFriedrich.org
Window Manager(s):   kde4-4.6.2 
X Window System:     xorg-7.5.1    X.Org X Server 1.7.7
OS version:          FreeBSD 8.2-RELEASE i386 (5.2 MB kernel)
Platform:            HP pavilion zd8000 (zd8215us)
CPU:                 2.80GHz Intel Pentium 4 (HTT) with 2 GB memory

FreeBSD Audio Driver (newpcm: 32bit 2009061500/i386)
Installed devices:
pcm0: <Intel ICH6 (82801FB)> (play/rec) default