How to create image upload button that uploads immediately after file selected?

Hello all!

I’m trying to add image uploading that’s similar to Google Photos, where the selected images are immediately uploaded to the user’s account after the files are selected by the user. I’m trying to use the Multi-File Uploader. These files should be publicly accessible, so I don’t think I can use the “Make Private > Attach this file to” option.

How can this be achieved?

In case someone comes across this in the future, the paid plugin Multi-Uploader is able to do this: