Recover corrupt GoPro MP4 files from SD card

About 5 files are corrupt or broken from a video recording on my GoPro Hero 13 Black. I can see the files using EaseUS data recovery tool, which means they are there. But when I open the folder on the GoPro or my computer, the files are nowhere to be seen... (Budget: $10 - $30 AUD, Jobs: Video Editing, Video Processing)