There is no flaw in Zeppo's logic whatsoever.
On the other hand, to call your reasoning "wrong" would be to give it more merit than it deserves.
Okay let’s follow the logic
All “A” + “B” = “C”
If homemade video with camera(A) plus shaking video(B) means (=) fake (C).
Complete nonsense because the premiss is flawed. Zeppo is assuming all A plus all B equals C.