Its difficult to decide where the line is drawn between ripping off & creating new, as even this video combines other peoples work to create content. Its nice that your giving credit but that's how a fair use review is suppose to be.
Let us remember that "muybridge animation reference" is where it all began. Let also remember that "similarities" nearly destroyed comics, because after 10 year legal battle over "similarities" in Superman VS Captain Marvel copyright law suit; the following year "Seduction of the Innocent" came out with completely delusional similarities between cartoon shadows & porn.
Cyberdevil
Oh man, seems like a common thing to do for practice, but going so far with something like this... interesting. Makes you wonder how many people out there are doing similar things; just haven't been noticed yet. If they just mix up their sources a bit more...