[@Noemi]
@Tom, I registered without a problem.
There is excellent freeware which cuts on any frame, not only on keyframe. Look for Smart Media Cutter.
All I could find was https://smartmediacutter.com/
It’s NOT freeware but freemium and claims to be “frame-accurate video cutting with AI-powered transcription.”
Problem with frame-accurate or cut on any frame is it WILL require re-encoding at least in part on cut on b or p frames up to next key frame bat most of these programs use stolen unlicensable FFMPEG binaries to perform the cuts so are bound to re-encode the entire stream as FFMPEG is not smart enough to encode up til next keyframe and copy from then onwards.
I think you miss the point of the giveaway it claims to NOT re-encode and therefore NOT reduce quality of the previously encoded video. Each generation of encoding using all modern high compression codecs like H264, H265 or AV1 or VP9 etc reduce the detail information in any video stream regardless of the bit-rate you choose to encode at so ideally you want to limit the number of these lossy encoding sessions you do. Smart media cutter is only available for windows 10/11 too and from Microsoft app store though there is a portable zip download, Just checked it is a GPLv2 open source program and includes GPLv2 or later FFMPEG DLLs so will likely do unnecessary re-encoding beyond the next key frame which could have been losslessly copied.