Trying to create color overlay in clipping mask
I have a template within Illustrator that a designer built for me. I do some design work but pretty basic and having trouble with this clipping mask.
Basically, they created it with a nice color overlay, but when I release the mask and try to use a new image and make the clip again, the blue green overlay goes away. How do I keep that color overlay? What am I missing/doing wrong?
Here is a quick 1 min video to show you:

