If you wanted to get the same effect for video you’d usually have to build one out of CFL bulbs or LEDs. It makes sense since the socket on most strobe oriented ring flashes fits a strobe (DUH!).
But if you just need it for as light fill and not as a main video light, there is a way you can use those modifiers for video.
I think that this can work great for small distances, and it is definitely a great use for a ring flash.