I agree with tressygirl's that eBay is unlikely to be interested in your video.

eBay decids disputes without even seeing the item concerned and it's become clear that their default policy is to accept the buyer's word for faults.  (You agreed in the user agreement to accept their decisions.) 

If you try to contest their decision the danger is that a damaging account defect may be placed on your account.

You can if you wish report the buyer for alleged abuse of eBay's money back guarantee. It's unlikely to have any immediate effect, but if multiple other sellers report the same it's possible that action may be taken .