How can I save flash (.swf) video onto my HDD?

OK, this is what I want:
I have access to a couple of webinar replays and online video tuturials (all in .swf format) and I would like to either download them onto my HDD or capture them using a screen recorder. I only want this for my own personal use.

This is driving me nuts: I've spent days researching and checking out various free screen recording tools, and except for one product (called Replay Video Capture - link here), they were all either producing really bad quality or the files were becoming too large (like 2-4MB per min recording) or I could not get the sound recorded.

I have also downloaded CamStudio but it seems full of bugs as I am getting all sorts of error messages. I even installed the Divx codec as per some Youtube tutorial but it does not seem to work or accept it.

I am on Vista and use Firefox. So then I did what was supposed to be possible which is download the .swf files from the "Page info >media tab" etc, then "save as" but the files are only like 50kb small and would not play or start to play. I think I need to watch the flash movies to the end before they are cached in order to download? Well, I have done this with a few test movies, but still it does not seem to save the actual video file.

Any ideas on doing this or any recommendations on a cheap or free screen recorder for this?

I am also wondering what the best file format is for a screen recorder, in order to have limited file sizes .... one webinar I would like to record/save is 1.5hrs long ... .

Thanks a lot