Just PM me for the 357max reamer, I don't have a video cam to do one, but I don't really think a video is necessary, it's just too simple.
There are good instructions in the FAQs, just never turn the reamer backwards, always turn it clockwise in the cutting direction and use lots of cutting oil, it doesn't hurt to remove the reamer every few turns to clean the cuttings off, and go slow keeping the reamer inline with the bore, mounted vertical in a bench vice is the easiest way to do that, don't use the ends of the reamer handle for torque, try to turn it from as near the center as possible, the last two I did I used a nut driver and a 3/8" square drive socket so I'm just twisting the reamer and I'm less likely to end up cutting an egg shaped chamber by too much side force.
Tim