The only solution I have heard of involves some work and computer smarts. But it's not impossible. However, I have not tried it, so I am not sure it work, and it would take effort. It involves running a virtual machine (VM). You can get a computer to create an imitation computer within itself with its software, whose desktop etc. show up in a window in your real computer. You get that virtual machine to run the vid, and then you can use screen-capture software on your real computer like Snagit or Screenflick to capture that vid.
It's easy to get free software to run a virtual machine—Oracle's VirtualBox, for instance. The problem is that you have to have operating system software (Windows, iOS, Linux) in a proper format for VirtualBox to use it—you have to create an ISO image of the operating system. That takes some understanding and knowledge to do. It does not seem overly difficult. I'm just a bit shy to be messing around with my computer like that.
I'm also not sure how good the results would be. In the case of the one model whom I follow who uses OF's DRM, the DRM already seems to mess up the video—it buffers a lot or the video freezes to an annoying degree (to such an extent, I cannot imagine but the DRM will hurt the model's sales). I can only guess such problems would be magnified if the video were running on a virtual machine, since I'm guessing that would have to run more slowly and less efficiently than my computer itself.