For TV (which I don't watch) this was nice. I could envision one of my professors doing something like this. It wasn't too far fetched of an idea. I even learned something, I didn't know that WT paper, gets darker in the fix and needs to dev less (I don't print WT much). I cued the video to the exact point, click here for the 101 on WT. All in all this was not only entertaining but informative at times. Good watch.
I always expose such that I can develop the print to the end and do not interrupt the development. As I use to switch on white light after fixing, how can I know about the darkening of the print in the fix?