You can place your own images into some widgets. Upload them before on any site, for example on imgur.com. Then copy it`s direct link (with .jpg at the end) and place to special field. How to get direct image link.
In OBS you can assign a hotkey to change scenes and show our widgets on them. Go to File - Settings - Hotkeys and bind key to some scene. To force widgets start when visible, go to layer properties and toggle "Shutdown source when not visible". Widget will start from the beginning every time you show it.