Wegame and Fraps are both free, I believe. I use capturewizpro for the tutorials, but it doesn't seem to capture the gameplay that well. However, I think my comp is the issue. Also check out RG's demo recorder thingy.
Demorecord didn't work with Foundry missions last I checked. It just shows the characters in a big blue room. On the upside, having characters in a big blue room can be handy for use of chromakey in machinima.
On the downside, I was thinking of doing an STO talk show, using a Foundry map to assemble the set.