Hi Benny,
I'm not able to view your videos on you tube-dial up is way to slow-but have raised rabbits in western NY. My rabbits saw -30F more than a few times and only lost an occasional kit mom dragged out or to the rats. (Rats love kits up to a month age-plan accordingly)
Mine were outdoors and in and definitely did better outside even with the bitter cold. I kept the nest boxes full of
straw or hay and made sure the kits were snuggled in at the bottom of the nest. My does were used to me handling them and their kits as sometimes needed to move kits to a mom with not so many to nurse.
Keeping fresh-unfrozen
water and feed available was key to success. Winter found me using metal water pans that could either take "dinging" to break ice in them or could be soaked in warm water to remove the ice. The feeders were self feeding for pellets with a cover for the outside portion of the feeder.
Will be adding a few rabbits to my farm soon-4 does and a buck. I'm fond of satins-which is what I had as a kid. They will have an open faced 3 sided shed, but with a critter proof front-most predators here love free rabbit!
My plan is a diet of alfalfa hay and orchard grass, with supplements in addition to the mineral blocks for rabbits being free choice azomite,
DE and zeolite. There will be occasional treats raised here on the farm.
The manure will be used for composting and manure tea. The process will also have shredded tree leaves added and other browns - roughly 3 parts manure to 1 part leaves/browns by weight.
I'll need to fine tune the tea making process for the farm conditions, but the intent is create a compost tea and use dried molasses on my varying crops including the alfalfa and grass baled for livestock and the sunflowers the goats enjoy so much. I'm looking to create a compost tea potent
enough for acreage rather than a few square hundred feet.