Not sure about the movement but how many days are you? That could also give you an idea if it's okay as if its still at that point of development but later along it would give also be a clue to if it's okay.
From some trial and error. I noticed a veiny look that would move when I moved the egg around 7-10 days. By day 17 I could see a chick kicking it's feet. If I ever figure out a way to transfer a video from a phone to a computer I'll post it.
Hope this link helps you with your eggs. If you have red veins that's a good sign and sometimes the yolk that the embryo is attached to will move slightly. usually if you have a dud egg you won't have veins but will be able to see the yolk moving round the egg. Depending on what day your eggs are on you will be able to see the embryo moving independently if you hold your egg still when candling.