Negative here too on viewing. My Mac doesn't like it and my PC doesn't either. It opened up on my PC eventually but I had to do a lot of clicking because of the exe extension -- security.
I'm not sure what you use. If you use Captivate you should save it as an .swf file. It's a flash file and any browser can see it. Plus the files size is smaller. Or, save it as a .mov/m4v or mpeg file. I use Camtasia for mine and I have a variety of production options. Captivate was a bit limited. I just bought Snapz for my Mac. Can't wait to try it out
Let me know if you need help and I'm glad that I was of assistance in helping you remember these videos that you have