I’m legitimately not going to watch a propaganda video, but going by the information the US had at the time and what the Japanese was saying and period official estimates of US and Japanese military casualties and Japanese civilian casualties, it saved lives. That’s just factual reality.
I am aware that there’s some people who try to revise history and reinvent the Japanese Empire into a state of almost being ready to surrender anyways, but using information not available to the Allies at the time is operating with massive benefit of hindsight, and it isn’t true, anyways. Both the Soviet invasion and the bomb prevented the invasion and saved lives. I’m sorry, but that’s just the truth.