First, please download and install the "RAD Video Tools for Windows" from the following web page:
http://www.radgametools.com/bnkdown.htm
Then please download the attached ZIP file and extract it to a subfolder "!CustomCutscenes" within your "Steamapps"-"New 'n' Tasty" subfolder.
If you installed Steam with default settings the files of the ZIP file should be located in the folder:
C:\Program Files (x96)\Steam\steamapps\common\Oddworld New n Tasty\!CustomCutscenes\
Before you execute the batch file you need to adjust some variables to the configuration of your system, which is quite easy.
Right-click on the file "ONnT-Conversion.bat" and select "Edit".
The batch file should open in your editor.
Now please adjust the two variables "SteamDir" and "RADToolsDir" as described in the batch file. Regarding the two paths the values should already be correct, if you had installed "Steam" and the "RAD Video Tools" with default settings.
After you have adjusted the variables you can save and close the file.
Now you can double-click the batch file to execute it.
Conversion of the original Bink video files is performed automatically using the "RAD Video Tools".
Conversion itself should be quite fast, but depending on the specifications of your system it could still take several hours.
The resulting files will be in Bink format with a resolution of 960x540 pixels and 30 Hz.
The original files will be moved to a new subfolder "!Original", and the converted files will then be used for the game.
After conversion has successfully finished you can start the game and check whether playback of the cutscenes within the game is now smooth and if the image quality is sufficient for you.
In case you wish to revert to the original files again, simply delete (or move) the converted files and move the original files back to their original location.