That was a good presentation — thanks for posting. The “ending” I was told years ago paralleled the youtube narrative, but at the end of the Presidium meeting, Khrushchev pulled out a revolver and shot Beria in the head, because he was too dangerous to let it wait; the subsequent Supreme Ct trial was staged to explain it to the public. Variants had Beria shot in the basement. The clips of the trial shown in the video certainly contradict all that, but those sneaky Bolshies were good at faking evidence, so who whos.
Speculation also is that Stalin himself poisoned Lenin, and Beria poisoned Stalin.