I asked about authenticity of it long time ago on https://skeptics.stackexchange.com/questions/20335/is-this-video-of-the-soviet-dog-revival-experiment-real htt

I asked about authenticity of it long time ago on https://skeptics.stackexchange.com/questions/20335/is-this-video-of-the-soviet-dog-revival-experiment-real https://skeptics.stackexchange.com/questions/20335/is-this-v... and the answer was that it was technically possible even then.