I've now publicly posted the video on how to (re)prove Schwabhäuser 4.6 for the Metamath Proof Explorer. Here's the final public link:
https://youtu.be/3R27Qx69jHc My thanks to all for your comments! --- David A. Wheeler -- You received this message because you are subscribed to the Google Groups "Metamath" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/metamath/E1jxETJ-0007sn-TE%40rmmprod06.runbox.
