That is true.
However, there are no free-roaming tortoises in New York City.
We need volunteers who do live near tortoises.
Quarky?

Would you volunteer?
You bet!
Can I be serious for a moment? OK:
I've been a keen observer of animal behavior for half a century. I've made the mistake of anthropocentric bias a few times, but more often than not, i've been validated in time by a background assumption that most animals have a lot more going on than we assume. This is a two edged bias:
Its wrong to think of other animals as humans in a different package.
Its also wrong to assume, due to our vast superiority and the Bible and stuff, that they are all dolts and we must dominate and exploit them all because of it.
That said, the video was heart-warming and cute. But I've never seen a turtle stuck on its back in terrain like that. They can easily flip themselves over, unless they happen to be on a smooth, flat surface, like a road or a table.
I'd have to add to that; these turtles are not the box turtles of which I m most familiar. They look a bit like the gopher tortoises of Florida, yet smaller.
Anyway, they have a more extreme hump on their shell. Still, its hard for me to believe that it couldn't have righted itself quickly on that turf.
Part 2:
I've observed lots of reptilian mating. Snakes; gators; snapping turtles and more. (I even have a short film of snapping turtles mating in the pond next to my house; perhaps I'll try to link it here.)
Its amazing what long and elaborate rituals they go through. Its not a 'wam-bam-thank you mam sort of thing. The snapping turtles, for instance, spent several hours in ecstatic foreplay; flipping each other about; flailing out spread-eagle; pornographic stuff.
My semi-educated guess is that the video caught some typical pre-mating behavior.
Btw, snapping turtles, though quite capable of moving fast; biting hard; inflicting wounds...are actually quite polite. I share space with them. Big ones. And I've nothing to fear, because I don't poke at them with sticks or try to kill them. They've laid eggs in my garden. No worries. Same with snakes. They behave badly under threat. I'm no threat; hence, peaceful critters, all.
Hope this helps.
Now, back to unseriousness for me.