How do I zoom in a title screen "into" the footage?

I started messing with premiere pro but I'm still a newbie with it. I want to do the cliche black screen title with footage playing in the text, and then screen zooms in into the text and we see the footage playing full screen.  Like this

I know how to put the video playing inside the text using Track Matte Key, but I don't know how to "zoom" the title. I've tried growing up the text size, but it grows until a point where it just gets blurry and the video stops playing inside it.

Any tips? thanks!