if you did everything what is suggested here, then you are probably out of luck.

that probably wouldn't help.

Look, bucko. Unlike you, I actually tested what I wrote in the videos guide. So I'd appreciate if you didn't state your conclusions as facts.

Point is that when you say something that contradicts a forum admin who's been troubleshooting this game for a decade + with other users, you'd better be damn sure of yourself because otherwise you become a source of misinformation, which is detrimental to anyone who comes along looking for answers and who doesn't know any better.  If you have a theory, deliver it as such, with appropriate disclaimers and it won't get confused with something taken verbatim from this forum's help repository.

You said here that you concluded it. And nothing in that thread suggests that you got your own cutscenes working with ffdshow 32bit. Instead you say there that you got them working on a clean system without any ffdshow installed. As the video guide says, registering the codec is all that's needed in many cases.
 
The cutscenes problem has changed a few times because of the inconsistent way in which MS included the Indeo codec (or didn't) and then crippled it and also because of the inconsistent Indeo 5 support from ffdshow. So I'm not saying the video guide held any eternal truths about it. However last time I installed SS2 about 3 months ago, it didn't work without ffdshow, nor with the 32bit version, but with the 64bit version.
If you have actually gotten your videos to work with 32bit ffdshow by now (and they crash without it on your system) then by all means, say so. This site wouldn't be where it is, if we didn't learn from each other.

Nonsense, the 32bit and 64bit versions of ffdshow can coexist without a problem.

I got hold of the game today, followed all of the instructions on the website, everything appears to be working fine (I looked into the getting videos to work thread before loading up, downloaded ffdshow and disabled all of the codecs related to Indeo). However I then stopped for lunch and shut down my computer, I came back and none of the cutscenes were loading, it was as if they'd been disabled or deleted. There would be an extremely brief black screen then gameplay would resume.

I reinstalled the game completely, started a new game and the cutscenes were working fine again, however when I restarted again the cutscenes wouldn't work again. Has this problem been fixed before? I'm on a Windows 7 64bit system.