Russian authorities have been known to doctor video evidence to show dead, injured, or out-of-favor commanders still going about their business. Equally, however, Ukrainian commanders have previously announced the deaths of Russian military leaders who have turned out to be still alive.
I am totally good with UA doing that, because it serves to sow confusion and force Russia to expend efforts sorting out it or covering it up.
Deep fakes are very easy to made these days, even in real time! You’ll just need a good enough GPU then use DeepFaceLive: github.com/iperov/DeepFaceLive