im not an ak expert but the problem crosses platforms at times and is more of a general iron sight rifle question in some respects
canted sights whether its an ak a garand an m1a or ak47 or any other iron sighted gun is caused by one of several things. bent barrel, incorrect indexing when mating the barrel to reciever(very common on ak47 but often mistaken for canted fsb to barrel), incorrect index front sight on barrel(not common at all on ak47).
when it comes to the imported guns they have american made recievers made in a factory here while the barrels are made and mated up in the same factory in the country origin. the barrels are removed or they never got a reciever in the first place. the factory here that makes the receiver (required by federal law) has to guess as to the exact location of the original receiver index mark so the pin hole is guestamated and drilled. the pin holes remove a small channel of metal off the barrel and putting the pins in will align the front sight base. thats why the bottom video is the exact wrong thing to do
the result can be a canted barrel. the only good way to fix it is to do it right when the reciever is made and the barrel pin hole is drilled. however thats not possible with the wasr. the sight itself is not the real issue but the correct fix is to redrill the fsb pin holes with a new fsb to barrel index.
now if you do what the moron does in the following video, while it works, you are bending the sight pins and end up with a wobbly front sight under recoil or have the whole thing shoot off the end or bend the front sight
one of the reasons arsenal conversion cost so much is all the machine work that goes into correctly mounting the barrel to receiver and correctly indexing the sights. wasr are cheap because they just slap it together and call it good if it looks like an ak47