YGO legacy of the duelist link evolution .DAT files

[Supurreme]

another update: i found a toc file thats just a list of files in the dat, so that might be useful to anyone willing to help: https://sta.sh/0uv0ws5qpqx

update: i finally managed to extract the files! big thanks to ziella for helping me get the keys i needed!

but now the problem is the files im left with

i know .dat files can literally be like, anything so theres no surefire way to know how to extract any given .dat which is the trouble im having....i dont really know much about reverse-engineering files so i dont know how to tackle this. if its any help, the file starts like this

and that continues on for a while before going on to this for another looooong while (this file is 1.4 gb!)

the end of the file is a combination of that jumbled stuff and script things like the credits, character names, and dialogue