Looks like the neighborhood queens and tomcats where I live during mating season.
They have shows like this in my driveway or nearby. My kids always ask what's happening, and I just tell them 'she's getting pregnant'.
Having had to endure the pains of pregnancy myself, I empathize and try to align with my feline sister by chasing off the train of toms that are waiting for their turn.
Without fail, they will run off, but never out of view of the female. She'll then start this weird meowing and rolling over on her back (like the lioness is doing here), and tooting her ass up in the air. Sure as day, the toms come sniffing back, willing to risk getting sprayed or whatever for a ten-second hop on...and the female, while not looking too pleased during the act, doesn't seem mind. She's only inclined to hiss and swipe them when they seem to take too long...
When I finally peep game, I drop my hose and go in the house when I realize the female cat is orchestrating and allowing all this shyt.
Nice to see the same fukkery goes on in the wild.
Interestingly enough, when a female cat delivers (I'm assuming this applies to the lioness as well), her litter can contain the offspring of all the toms she mated with, which is why kittens sometimes come out looking so different from one another.