Trying to make a sticky section?

I have an element I’m trying to make sticky. I’ve looked in the help files, but the sticky option isn’t available on the element I have selected. Sharing my file below. I want to make the entire left side sticky so that as the user scrolls down the page, the image (of the video) stays in view. Any ideas?

[removed Figma file]

Unfortunately at this point the Sidebar (Frame 183) can only be set to sticky via the Prototype panel when it is a direct child of the screen frame and when there’s no Auto Layout applied to that parent frame.

Thank you for clarifying how this works!