Blog media viewer is a web application that lists videos hosted on a wordpress.com blog.
So, you don’t have to browse the entire blog to find the videos, Blog Media Viewer does the work for you.
Once you have the list of the videos, you can click to go to the original article or click on the video to watch it.
Blog media viewer uses the WordPress.com REST API to fetch data.
You can find Blog media viewer here
Here you can find a list of applications that use the WordPress.com REST API