It might be OK
Main thing is it aint going to fail immediately, it will be over time, so get out and start using it, hopefully you will be better than that video
The thing with plates like that, they are ok if the two outer skins are reasonably solid, but to be honest most outer layers on boards are quite thin and while they are generally ok with your weight being spread out over the area of your foot, but what will happen here is you will get quite high point loading on the corners of the plate.
As ronnie says put the board upside down and have someone leaver on the foil, see if the skin starts to flex.
Just do this after a couple of sessions and keep an eye on it, if it starts to go soft it will be easy to put another couple of layers of glass in the high stress areas, all you will have to do then is cut some tubes a bit longer