Cats is such a bizarre phenomenon, I don't really know where to even start.
It's not just the movie. That a stage play based on a series of children's nonsense poems would not only be made, period, but that it would go on to be one of the most popular plays in some of the biggest venues is one of those things that make people say things like "well, it was the 80s" and "cocaine is a hell of a drug". Heck, there isn't even a lot of anecdotal evidence that drugs were involved any more than usual, if at all.
But, of all the inexplicable things, I'd like to point out the original tagline of the movie, which is so generic for such a weird property, stood out to me. "You Will Believe".
I will believe what, exactly? Neither the poems, play nor, it turns out, this feature length film has much in the way of thematic content, other than maybe "cats". Certainly, questions of faith or belief are not addressed. You could say the "jellicle cats" are a sort of feline cult to the moon, but there is no interest in the philosophy or theology of this possible cult. Certainly, I didn't come away believing there is some "Heaviside Layer" that would grant cats an extra life if they sing a song really good. Furthermore, I don't think the movie was trying very hard to make me a "believer".
So let's actually talk about the movie. The very first shots are set at a human level, as a canvas bag with a cat inside that we will learn is named Victoria (Francesca Hayward) is thrown out the window of a moving vehicle, apparently abandoned by her human owners, who we never see. This departure from the stage play, where we are given a point of view character who is new to the world of movie to have stuff explained to, is a welcome addition.
It's also the only thing the opening scene gets right.