Trail twister has some good stuff going on with his raised beds.
You are correct that it is Hugelkultur.
IMHO, PT is fine dont believe all the regurgitated hype that it is unsafe, folks are using plastics, galvanized steel, old cinder blocks that may not be as safe as PT. Just do your homework and make an informed decision.
I definitely suggest 2" over 1" for longevity.
I do a sort of Lasagna gardening and no till in my Hugel Beds. Also I try not to remove anything at all from the beds, that includes weeds and rogue maple trees, everything is chopped and dropped. If something invasive goes to seed, it is put in a bucket of rain water for a week or two then dumped back in the beds.
There is one caveat to using logs in the bed... getting a dam tomato cage in the ground lol.
Another issue could be too much carbon tying up nitrogen the first year or two, I haven't had this problem. If you do the beds now and cover crop with some nitrogen fixers you should be good.
I do oats and Crimson Clover in the fall. (Water lettuce from the pond as a base)
If I wasn't so impatient, I would have built the beds in the fall, filled with logs and loaded up with yard waste, kitchen scraps, old potting mix, compost, wood chips, leaves, pizza boxes, newspapers, ashes, bio-char, urea, pond waste, and tree trimmings layering with my native soil throughout the fall early winter.
The only thing I would do differently is not buy any top soil, my heavy clay native soil has been good to me over the years. All my beds have at least 20 percent my native clay soil. The bagged amendments was a one time deal and nothing is put in these beds that are a purchased item. I make my own fertilizer and so far (2018) it has worked for me.
Here is a bed being prepped for winter, nothing is removed from the beds, weeds, plants, roots, everything stays.
Topped with shredded cardboard.
Topped with some old potting mix and seeded with oats and crimson clover
Covered for several days, then boxes are removed and composted.