DOD:S actually annoys me in that sense.
Before the epic update, I could just run it in DX8 if I wanted to record something, and keep a steady framerate.
Now for this video, because some stuff is so poorly optimized, I had to run it in dx8 in a low res, with a custom autoexec.
If I had any computer better than this laptop, I would have happily tried to do much better.