macOS: Video playback with sidebar not hidden

Hi,
I’d like to be able to view all my media files in the sidebar as a tree view and when selecting a video, it plays in the video section of the app rather than hide the sidebar and display the video in the entire region.

Is this possible?

Thanks

Welcome to the forum!

What device are you referring to? Mac, iPad, iPhone, Apple TV?

Moving to suggestions. Thanks!