To be able to grow an amount of wires as demonstrated in the video she'd have to have an incredibly high and therefore deadly load of metals in her body. Not to mention many other equally suspicious things: lack of wounds around wires, her healthy looks, the attitude of all involved (seems like fun to them), and the claim that if cut the wire retracts and then travels to a new place. Imagine the damage to internal organs if that were true.
Besides if they really wanted to be taken seriously, they would show an x-ray, and what happens if they try to pull a wire out.