That’s it. I wonder what it is? Base for some large component like a motor or something? Gigantic air conditioner? Who knows? Can anybody identify that thing?
Otherwise, I will no choice but to assume that it’s a big speaker for Millie Vanilli’s comeback tour.
Here is another angle:
The whole video:
On of the 2 comments mentions Komatsu and that means bulldozers & excavators.
My guess is the bottom part of the rotating upper body of an excavator.
Something similar turned up in the same iamge search:
PHMX 4436 | Except for a spacer all of the cars were multi-t… | Flickr contains photo, according to the guy who posted the photo, of a crane turntable
The photo posted by Frenchy can be found here together with some other turntables and excavator parts:
Parts (hub?) for a windmill
Or the world’s biggest DSLR camera without its outer casing, and a protective cover over the CCD sensor, which was my (quickly dismissed) first thought.
Robin beats me to it ! Here’s another crane/excavator part I guess
H.P.
Another Komatsu part picture ( from Facebook ). According to one of the comments there it could be the base of a dragline…
P&H Mining/Harnischfeger machinery
H.P.
and that my friends is a VERY rare event indeed,
I think it has only happened once per year or so
The year’s not over yet… 
H.P.
It’s the new iPhone 2200 prototype. It allows everyday folks to take pics like the Hubble 
From a Swiss company 
H.P.
From Lithuania
Wind turbines parts :
H.P.
Catalytic crackers
Shipping container for spent nuclear fuel used by the U.S. Navy :
H.P.
More German gliders views
DFS-230 of the 8./Luftlandegeschwader 1 (8./LLG1) in Norway (1943)
France 1940
H.P.
Army centipede ?
Below is a RSLP – Rocket System Launch Program vehicle, used with the Minuteman
III ICBM :
Wind turbine parts again…
H.P.
H.P.
Australian circus train circa 1920
1951
H.P.
Dragline buckets
In July 2010, Indiana Railroad hauled 2 Bucyrus-Erie dragline 115 cubic yard buckets from the Blackhawk Mine to the new Bear Run coal mine. A lone SD40-2 along with the two low-boy flats is seen here running south of Dugger, Indiana, down the new trackage that leads to the Bear Run mine.
More here : https://rrpicturearchives.net/archivethumbs.aspx?id=58223
H.P.
