VidyoDesktop stopped rendering other participants' webcam feeds

I can’t verify that this is an Nvidia issue, but I suspect it is, because I haven’t seen any other Linux bug reports and I assume most people running the (quasi-proprietary) Vidyo teleconferencing client are on Intel notebooks. Reverting from 367 to the newest 364 driver doesn’t seem to fix it, and I don’t really want to test any farther back. For the past month, Vidyo doesn’t show other participants’ webcam feeds; only my own webcam, as well as any screen-sharing other participants may be doing.