It's weird I didn't get the notifications for the new posts in this thread, thanks for the PM deton24.
So :
Now that I see the screenshots again, calling the videos "high quality" is kind of strong ^^
Yes the "rdft" bink audio is an old crappy format and it's the value 100 for sound compression in the RAD software.
RAD Video Tools relies heavily on QuickTime for its work. Unfortunately you'll have to install that sh*t on your computer. And if you want to convert to bink videos that are in other formats or containers, install LAV filters :
https://github.com/Nevcairiel/LAVFilters/releases
Polish audio is not present in my patch, only those :
Track ID 1 English
Track ID 2 French
Track ID 3 Spanish
Track ID 4 Italian
Track ID 5 German
Using the PC rdft bink audio as source and recompress it in rdft again will affect the sound quality a lot. The PS3 or XBOX audio would be better, but I don't know if the Polish ISOs exist out there.
Recompression is inevitable, but you can almost entirely eliminate the quality loss by putting this value for the data rate in RAD : 1431655765
I kept the original videos in case of a situation like that

But as I said here :
https://raymanpc.com/forum/threads/rayman-m-x64-installer.9727/page-4
when I enter the values for making the videos in RAD, it crashes. The value that is making RAD crash is the "-" in width before the number. Several clean installations of Windows 8.1 and 10 have passed since, but no luck.
I'll get in touch with the support team of RADGameTools but they answer as they please.