Both versions use the same extension but have different structure
image

The idea is to be able to decode the pc version and re-encode it for the dreamcast version.
I have been investigating and the game belongs to ARXEL TRIBE, but I have not found any type of tools for this type of rows, I have also tried with ffmpeg, but I have not achieved anything, so I may not have anything for this row.
I leave here the same fmv of both versions, maybe a script can be created for decode pc and encode dreamcast