I capture with a good analogue to DV device, but in the case of Star Wars I capture each side of the laserdisc 5 times then merge them together to reduce RF noise in the laserdisc player and connecting video cables (it definitely works) and save the merged DV files as huffyuv, but forced to YUY2 because the resulting files are notably smaller than RGB compression, I know it looses some quality but the source is DV anyway and I don't have the HD space for RGB compressed files.
A full 2 hour PAL film capture of ANH without the unnecessary top/bottom black bars compressed to huffyuv YUY2 takes up roughly 30gb, not really the kind of size you'd happily post to or download from usenet, it would ideally be distrubted on harddrive or failing that a pile of DVD-Rs.