coming from Full-Timing in our motorhome for 6 1/2 years and experiencing ALL KINDS of power outlets, sources, and connections along the way, none of this phases me. I've installed 30amp and 50amp 240v outlets and runs and wirings for our needs many, many, many times. Our motorhome had a substantial INVERTER, as well, which brings in the capability of 'off-grid' living - which brings me to this video's point - no one can determine 'how long' your truck's battery will provide 'power' to your home - that is just not something anyone, even yourself, can know for certain.
What you can do, as we did many times when off-grid on the inverter in the motorhome, is monitor our power requirements, such as fans, microwave, phone charging, tv watching, and fridge usage, along with paying attention to the level of the batteries. I wish I had THIS size battery, of course, as our motorhome's system was made up of 4 deep-discharge 'golf cart' 6v batteries, and a sizable Magnum 2,000watt Inverter. In some situations, you might go 5 minutes, and in others you might go 5 hours, and overnight, with little 120v usage, you might go all night. Another consideration is the battery LEVEL when you need to make use of it - many of these discussions and videos 'assume' that the Truck will have a FULL 100% battery when a power outage occurs. Even Ford recommends that you only charge your vehicle up to 80% on a regular basis. So, the reality is that you'll never KNOW what the outcome is until the time comes. If you are one to want your truck's battery to run your home's HVAC air conditioning, I'll bet you won't last nearly as long as you will if you can get by with 120v fans. Using a large-draw 240v device like your oven for several hours to cook a turkey also might not be a good outcome. But, for the most part, with such a large battery bank as a 'generator' for your home, if you use it for your 'needs' rather than for you 'desires', you'll probably be surprised at it's longevity in the midst of what otherwise might be an aggravating situation. I think most folks will forgo the 'need' for a full 'whole house' automated backup system and simply do as they have done for many, many years - plug into their 'generator' for power, their FORD LIGHTNING generator!