Moov atom not found

I have a corrupted video file I recorded and when I try to convert it using FFmpeg (copy settings), I get the error message: "Moov atom not found". I tried Video Repair Tool, and it worked to some extent, but the results are not satisfying at all. I tried AtomicParsley, but whatever option I trigger, it opens MPC-HC and does nothing (MPC-HC says it cannot open a video file). I've heard of Untrunc, but unfortunately I am not familiar with compiling the source codes. Can somebody do that for me, please? And can you tell me how can I fix it? Thank you in advance.