Before you remove any plastic trim ensure that it is warm - if cold and brittle, then it can snap.
There are no videos, but these panels are similar for most car seats; they will be clipped to the metal seat frame, with a couple of locating tabs at the base. You release the panel (top then sides), then lift upwards.
if you looked at the manual I sign posted you to, then you would have seen these additional images which will give you an idea of where it is secured: