Well, some of that was touched upon in the thread
19 degrees in South Texas ? ? ?, but I'd be interested in the videos you reference. And I dare say the topic might benefit from more discussion.
Propane buddy tank capability - that sub-discussion (some would call it a hijack) started
here.
Extra blankets to be comfortable with lower inside temps - I recommend goose down, goose down, and more goose down. Spendy but worth the investment and it saved my bacon two weeks ago. We have a
Rumpl trekking blanket and a
Disco oversized sleeping bag.
Emergency water supply - Well, I had two 300-gallon outdoor rain tanks that were full, but which froze into solid monoliths. Inside my powerless, heatless house, I filled a
Water Bob that I had been gifted almost 20 years previously, but never had reason to use (during hurricane outages, I can rely on my rain tanks).
Powering your house from your RV generator - I would argue that it's not necessary to power the house, just one or two key appliances. I bought a 5 cubic foot freezer that I can power using our van's generator and the external propane tank solution that we slapped together.
Also - This event got me off high center, and I finally ordered a
Gstove. There are a number of choices in the micro-bio-burner product category and I'm not sure that Gstove is the best, but I chose it with an eye to future versatility. A cast iron tiny stove would probably be a better heat source, but carrying the weight in our van with its current manifest? Not an option.
Of course, if one happens to be caught on the road at the time of a winter catastrophe, the responsive options are much fewer.