If it helps at all...
SWF video is usually 15 fps, & there are a couple of codecs used. TO convert SWF to avi, the easiest way I've found personally is with Super; swf to avi isn't the most common or popular conversion. For a light weight player of saved swf on your hdd, you might look at SWF Opener. With 6 tabs open, playing the linked swf file, Firefox in TaskMgr showed 211,000kb -- in SWF Opener, it got to about 131,000kb. If I had to guess (which is what I'm doing
), I'd say part of it was the codec implementation Camtasia used, though that is just a guess. I opened a flv I had (the actual Shockwave format video in an SWF) and it was in the 17,000 kb range. If you watch TaskMgr though you'll also see the memory usage go up along with frame numbers... The linked video has a large frame, & as the amount of visual data increases, so does the memory to hold it.
While it's possible some other software of DS filter could be effecting playback, in the end I'm inclined to mostly blame the Flash video format -- as codecs or formats go it's at or near the bottom, & the only thing going for it is people tend to hate MS, so it has the 2nd most available player.