Re. the video:
Why would anyone have a yard so BIG that the clippings alone would produce a big pile of compost? Very strange to me, as well as labor-intensive; maybe some of that big yard should be turned into a nice veggie garden, or herb garden, or even flower garden.
Or, for those more into long-term plants, turned into roses or other perennials.
How much nitrogen-rich fertilizer is being used to support this very large yard which is being mowed so frequently that its clippings create a compost pile? Wouldn't it be more energy-efficient (people energy and
other energy) to grow food, whether for people or pollinators? Or perhaps provide some beauty? A small
yard can provide a nice place for kids to play or a family to spread out a picnic blanket, but a yard on the scale this man is discussing is, to my mind, impractical and (dare I say it?) wasteful.
So many kitchen scraps, household scraps (e.g., cereal boxes, toilet paper tubes), and other freebies come easily to hand almost daily and for very little effort that it seems a shame not to take advantage of them in making compost. I feel good that my garbage can is never full these days and hasn't been for several years; each and every item in it is there *only* because there's no way for me to re-use it, recycle it, or compost it.
I wrote this down in this forum, in color and with fun fonts, a few years ago, and it's still true:
Greens + Browns + Air + Water ==> Compost, eventually
Re. the OP's question:
The minimum size usually agreed upon as productive for a compost container/pile/bin is 3'x3'x3'. The largest size usually agreed upon as being manageable and productive in a home situation is 4'x4'x4'. Smaller piles don't generate and retain the necessary heat, and larger piles may generate or retain too much heat in warm climates, necessitating very frequent turning, which many, if not most, gardeners find burdensome.
Sunset Zone 17, USDA Zone 9