Some of my very favorite YouTube channels that I have learned a lot from. Click/tap on the name and the video channel will pop up in a new window.
Prepper/bushcraft/living off grid
Reallybigmonkey1 - My most favorite channel for bushcraft/survival.
Dehydrating/long term food storage
Linda's Pantry - Has some good dehydrating/meals-in-a-jar videos.
Perbain - She is no longer with us, but she left us a lot of knowledge