BakedGoods: I tried this mod with my Steam-version of the game. It didn't launch. After hitting 'launch game' my cursor would just spin, then stop. Only after I removed the intro mod did it run.
Not sure what that's all about.
Steam might be a special case, hard to know for sure.
I would need the file video_start.csv, but its packed inside the 9 gig pack0.dzip
Unless someone unpacks the steam dzip container, and posts the csv file, I cant check if the file is different.
Edit:
An easy first step is to check if the Steam pack0.dzip is the same size as the GOG one.
GOG pack0.dzip = 9,24 GB (9 924 219 493 bytes)
If they are the same, the file inside is probably the same and I have probably made a mistake with my mod.