Video about how to take out the back seats
 

We show actually how it is mounted, but you will get the picture.

https://www.youtube.com/watch?v=cJzCjf8kr1g

You should have gone all the way and shown how to take out the rear deck cover. You have to take out the sides of the seat to get the rear deck cover to come out so you can change the speakers.

I didn't do it, because I didn't need to take it out. I film the things, I do on my car. I didn't want to change my speakers :-)