Hi,
I have recovered some mp4 files which I deleted manually by mistake, from my micro SD card (the card was not formatted afterwards).
I used Recuva Pro. The software found some files with "good chances" to recover, but after processing only one of 48 recovered videos would play.
I tried various players, under Windows 10 and MacOS, only to receive non-compatibility report (also from IrfanView).
All files' parameters were recovered properly (full name, size, time signature).
Is there any trick to repair those videos?