Repair corrupt video files having lost video identification (delete recover, i.e.), can be done getting infos from a valid video of the same type.
Tools (like Stellar, ...) get properties from a same valid video, and apply them on the corrupted videos, to make them work.
I guess Avidemux could easily do the same (or already does) ..
What is "loss of video identification"?? When a file has turned into digital garbage?