Minecart can't see and rides beneath the cart.

At start it seemed fine, but whenever I'm on a minecart, I can't see anything and it seems I am beneath the cart.
I tried searching for other issues, but I had trouble finding so I apologize if this has been issued.
I have uploaded what it looks like.

https://www.youtube.com/watch?v=gxIkaKC-INY&feature=youtu.be