Who does not have the ability to take video these days. If you don't own a cell phone, a web cam, or a camera with video, then you know someone who does. Do you expect Hobby King (or any supplier for that matter) to just mail you a new part without at least some proof that the old one is bad? They don't know what you have done to the product. They don't know you by anything but the order you placed. You need to respond with the order number and some proof. I don't think that is unreasonable from any supplier.
I have had generally good luck with Hobby King... I know and admit that others have not had such good luck. I will put their NanoTech batteries against any ones.