Hi Peter,
read your post some days ago already but wasn't able to reply up until now.
So very sorry to hear that flashing failed! I hope this isn't a huge loss for you and still can't believe there's no backup option within the flash process.
One question: did you make another flashing attempt after the first fail? In your vid the flash tool returns to the prompt after the access error. That makes me wonder if it would have been possible to start the process again.
So I guess it's up to me now to try my luck. If it fails I still can sell it to Paadam 😉
RetroPC: K6-III+/400ATZ @6x83@1.7V / CT-5SIM / 2x 64M SDR / 40G HDD / RIVA TNT / V2 SLI / CT4520
ModernPC: Phenom II 910e @ 3GHz / ALiveDual-eSATA2 / 4x 2GB DDR-II / 512G SSD / 750G HDD / RX470