Trying to link to an image stored in a cloud drive

I am trying to link to an image to bring into a page directly where the image is stored on Dropbox or Microsoft Onedrive. For example, the Dropbox URL is

Of course, it's no problem when an image is on my hard drive and then I bring it into the media library, but I am trying to reference the image from a cloud storage. I see the url is (https).

When I try to insert it on my page, nothing shows up except a image placeholder. Here is the code I'm using: <img src="">

Can anybody help on this one? Thanks, Joe.