You can always save edits in a tiff or DNG format for stills, but you may lose the ability to re-edit later. I don't save files as PSD very often, so my edited files become tiff files which can be read anywhere.
They are not moving Lightroom to the cc, so for now, my lightroom edits are safe. I have not been saving them all to jpeg, and probably won't. If I need a old image, I can always re-edit the cr2 file 10 years from now using whatever software I have.
Video will be the same issue, both the source and output files are safe. Its a question of re-editing.
I think I'll avoid using DNG, since its obvious that Adobe might take it away whenever they think they can make money by holding images hostage.