First of all, that video was horrible, and no i wouldn't even piss on those people doing it to put the fire out if they were the ones getting burned.
But as for the rest of the post, have you ever had a cat? if so have you ever seen it drag a mouse into the house?
My cat has done so a few times, where we've had to stop him, cause he will not kill the mouse, but play around with it, damaging it more and more before killing it. Cats, no matter how adorable, and ovely they are, sometimes play with, and torture their prey.
Ferrets, or pissibly some wild counterpart of theirs, is know to sometimes go into some sort of bloodrage, when they enter a chicken farm or soemthing like that, killing all the chickens, despite not remotely beeing able to eat anywhere near all of them.
A few years back, there were news footage of dolphins using another species of smaller dolphin like creatures as balls in the air, for fun, and hits was not trained dolphins, but wild ones.
Read the news close enough in times without much to write about, and you'll hear stories about bigger dogs killing smaller dogs, with no intend of eating what they've slain, you could say that they are mistreated dangarous dogs, that are not right in their heads, but i'd be willing to classify those people in the video as dangerous fucktards, who should be locked up for the safety of their surroundigns as well, without having to pass judgement on every human, just as i don't consider all dogs ferral beasts who will bite and kill whatever they can, due to a some screwed hunting instinct.
And more importantly, compasion and empathy, which would be more or less the moral opposite of the sick behavior displayed by the fucktards in the video is a thing rarely seen in most animals towards other animals not of their species.
You don't see animals feeding other animals, unless they need to like ants using theese smaller bugs i don't know the english name for as cattle, protecting them, but only cause they "milk" them.
You don't see animals giving a fuck about what happened to that dog, apart from maybe beeing scared, I know there was a gorilla who could speak sign language, who had a kitten, and expressed that she felt sad when it died, but this is a rare exception.
You don't see animals caring whetehr their prey dies as quick and painlessly for the sake of the prey, and not just the efficiency of the hunt, just ask the komodo dragons, who bite their prey letting them more or less rot alive over several days, while following the stench.
I know there are exceptions to this, for instance many dogs will fight to the end to protect their humans, and possibly other animals in the familly, and there have been examples of animals of one species adopting animals of other species, i think it was a cat with kittens taking in a baby racoon, or skunk i saw a video of. But overall, these are rare exceptions, not unlike the rare exception of people like those in the video.
I don't think you can look at their lack of "evil" intend, without considering the other side of the medal, which is their lack of "good" intend.