For the second video, I won't do a line-by-line translation, but the idea is that the adapter can take lenses as heavy as the 1st gen 90mm summicron, or around 700g, with the AF still functioning. Using the adapter with the lens focus set at minimum focusing distance can reduce its minimum focus distance by up to 60%. In the case of the CV 35mm F1.2, the MFD can be reduced from 50cm to around 25cm.
Victor is too lazy for DSLRs
Sony A7rII Kolari mod
Noctilux ASPH, 35lux FLE, 50 APO ASPH, 75 APO cron, 21lux, Sony/Minolta 135mm STF