Where does that meme with mutations from radioactivity come from? Was it propaganda from the anti nuclear power lobby or has something like this actually been observed after the expossure to radiation?
It is very much a thing, and done deliberately, though it's a lot more prosaic than depicted in movies: https://en.wikipedia.org/wiki/Atomic_gardening
Here is the song (German): https://www.verunsicherung.de/diskografie/songs/burli.html
I am not willing to spend a lot of thime on this, but from first glance I can see that they are misusing a mutant deer from Georgia/US (1:10 into the video) for their narrative. Who knows if any of the images there are actually from Chernobyl. And that video has 2.6 million views.
You really should have watched the video before posting instead of just finding some propaganda to repeat. I have no doubt you can find an example which will "prove" you right, but it will take you a fair amount of digging most likely and is about as common those heavily mutated births caused by radiation exposure.