might depend on your drivers and stuff karl, also how fast your pc is (and i havent a clue on that)
old amd k6/2 400 of ours had terrible, awful trouble with anything over 320x240 in divx wayback...
...and right now ive got a sneaking suspicion my at-least-4-times-faster Duron 1600 is requiring a heimlich manoeuver to get the rest of the low quality version of the video out of it's gullet as it was seriously choking. Unless of course pete, you encoded it at 12 frames per second??
(all my video's currently playing thru winamp, which has an FPS readout)
I'd suspect the choking, because it feels like you're trotting gently around a car park insofar as i watched (a good couple minutes) but i saw flashes of the speedo needle up high enough for at least 45-50mph...!
Initial comment: for "low quality" it's still seriously far too high resolution - as above, it may not be too much trouble if you're on 1mb broadband (it's only... hey... 4 minutes sitting waiting?) but it might be too much for some people's CPUs.... MPG4 is high on storage efficiency but is FAR more demanding of chip cycles.
"DV-quality" footage is pretty much fit for broadcast seamlessly with studio-shot stuff, far greater than is required for t'internet, and in-car bez-around vids are not worthy of such clarity especially when space is the price. not that i think great clarity was acheived anyway - the image looked kinda blurry for 720x528, i think the codec had to work hard and over-smooth a lot of stuff so that it didnt go blocky (getting all that, at that rez, into 30mb is highly applaudable). I'd crop it a little and try again at around 352x256, 320x240, with less severe compression. Trust me, it'll still look alright, even at full screen.
In fact unless you're really bothered about getting your heated rear screen light, gearchanges and a lot of your hands in, could probably crop it down to widescreen, just get wheel, guages, and most of the windscreen, save a bit of bandwidth.
In any case cheers for sharing, it must have needed some effort at the very least to get the camera rigged up........... dedicated dubber! You know how to get the equipment set up properly and have a love for it, so the results could be special with better equipment. Even if you can only get out at night, have you considered using night-shot mode or tweaking the camera's exposure/shutter settings?
I'm off to load up virtualdub and see if my claims bear water, and to see what sound codec you're on (another great way to save, or waste, bytes

)
...... right now i was wanting to upload a couple little (rather badly shot themselves!) videos of my own but im having trouble figuring how to get my only ftp program (MS Web Publishing Wizard

) to talk to groovy's server in such a way that it will create the much-needed new folder instead of just plonking my stuff in the root directory.
EDIT: got one thing uploaded, and the original vid is redoing as a test - reencoding at about 10fps at the mo. got it brightened upsomewhat (approx 2.5x) down to 320x224 with minimal croppage and whilst it isnt quite as good, it's only lost a little quality (magnifying and enlightening the original overcompression is the thing..)
unfortunately it's divx5 vanilla CBR (as its all i can handle - xvid and the more squinky divx modes have recently got far too complex! might have a quick bash later though as your original appeared to be VBR..) and silent.... virtual dub was having none of your otherwise pretty cool mono VBR mp3

sorry like.
gonna try uploading a second vid and then getting linkage