For the recovered MOV/MP4 video files, in most cases, they can play directly. In case some of them cannot play, probably the structure or header of the video files was broken due to partially overwriting, damage or crosslinking.

If your recovered video files can play directly without any problems, please discard the following message and no post process is required.

If the recovered files have a .MOV file extension but your camera actually uses a different video file extension, you may try to rename the extension of the recovered .MOV to the original format extension of your camera (e.g. .MP4)

Regarding how to rename extension in Windows, please check the following tutorials

https://www.google.com/search?hl=en&source=hp&q=change+file+extension+windows

If some of your recovered video files cannot play properly, you may try to play the recovered video files in a different video player, or search the net and try some video repair or convert tool on the recovered files. Hope that helps.

VLC Media Player:
https://www.videolan.org/vlc/

It is a freeware (opensource), and available on both Windows and Mac platforms. It can play various video file formats and has some built-in corrupt video repair features.

VideoRepair.com Online Video Repair Service:
https://www.videorepair.com

Above website provides an online tool to repair corrupted or broken video files (MP4 and MOV). No software download is required, but it does not support videos from some cameras like GoPro and DJI.

If still no success, sorry, probably the video files are too corrupted to recover in this case.