How to Build A Wordpress Theme: "The Loop" not working

The video I am stuck on is "WordPress Theme Functions" in the "How to Build a WP Theme" project.

I have created The WordPress Loop, and pasted it into the front-page.php file between the header and footer includes. I have three blog posts under the "Posts" section of the admin menu, as well as a page called "Blog" under "Pages."

The video makes it look like the "Blog" page is supposed to go to the front-page.php template and display all posts, but when I click "view page" in wp-admin, it goes to the page.php file instead. I put the Loop in that file, figuring I'd make that work for me instead, but it's not grabbing the three blog posts I have published. It only displays the included header, the "this is page.php" message, the "Blog" page title and <hr> I added, and the included footer.

Can someone help me debug this?

EDIT: it is displaying the posts when I click "view page" on the "Contact" page under "Pages." So I can confirm The Loop is working somewhere.