Where, does it specifically answer the question i asked (they no longer resemble our species in some significant ways.)
i asked for elaboration on the changing so much that they no longer resemble our species (humans) in significant ways. What do they resemble, if not humans?
Don't you see how the nested hierarchy of species answers that question? In the video he went from single celled organisms all the way to humans.
The fossil record and genetics indicates our common ancestry with such precision that we can put it all on a tree of life and it matches perfectly with what we find in morphology.
That being said, at first glance, two species that diverged from their common ancestor a very, very long time ago might not look anything like each other but they won't be so different that we wouldn't be able to tell that they were related when we look deep into their morphology and genetics.
So in a few billion years, our descendants might not look much like modern humans at all, but no matter how much they change, we'll still be able to tell that they came from humans when we study their features closely.
A real-life example of this would be dinosaurs and birds. Birds don't look much like cretaceous-era dinosaurs but they still have enough in common with them that we can tell that they descended from dinosaurs by looking closely at their fossils.
...and again, DNA evidence is confirming this. We can now analyze dinosaur DNA that we've found to tell whether or not they are the ancestors of modern birds.
I hope that answers your question. Evolution can cause drastic physical changes between related species but both species will still always just be modified version of whatever their parents were.
This is why the "yeah but it's still a fish!" argument that creationists love is just plain ignorant.