So now your saying that some group manages the "nuclear hoax"? Do you have any evidence for that? Do they coordinate hoax videos and pictures even among nations who aren't friendly toward each other?
Since you have stated that governments actually believe they have nuclear bombs, this international atomic bomb hoax group must be very powerful and persuasive. Frankly, I find that the more likely explanation is that atomic bombs are real, but that just may be the media and education system taking I suppose.
Other than the arguably ludicrous complaint that the mushroom cloud in Hiroshima and Nagasaki should have been documented thoroughly by the Japanese media, in general terms I'm still unsure what kind of evidence you would consider legitimate that atomic bombs exist. For example, what if a video of a nuclear explosion was sent to an organization or company who specialized in analizing video told you that the video was legitimate? I realize that your response would be that the company was controlled by your mysterious hoaxing group, and I know you aren't really a video analyst, so who would you turn to?