Good catch on that @phiphi-the-frenchie. I just analyzed that documentary video and came up with the same result you did. There should be 2.78 seconds between shots 3 & 4, but in this video there is only 2.32. So, 0.46 second was edited out between the boom of shot 3 and the crack of shot 4. I don’t see a corresponding jump cut in the video, so this seems to be an audio-only edit. Why? Malicious tampering? Perhaps, but I doubt it. What would that accomplish? More likely the audio engineer heard a weird noise or cuss word and chopped it out, thinking “no one will notice”.