Yes I tried to remux, I even tried to fully re-encode the video, with staxrip, mediacoder, mkvmerge, avidemux, but surprisingly none can repair the damage part of the video. I read on a lot of forum on internet that there is no software which can do that with a .mkv or .mp4. I only can keep meteorite, it's better than nothing.
I will upload one of my video anyway when I will have time, maybe someone will be able to do something here.
Fortunately I have only the first one/2 minutes of each damaged video that causes issue, the rest is OK.