Overlay elements onto images and video
Image and video blocks can act as containing elements just like sections and boxes, which allows you to overlay elements on them.
Drag and hover your elements on top of your image/video until you see a light blue overlay. This will confirm that you are dropping your elements on top, not above or below.
If you are adding multiple elements on top of your image or video, it is best practice to group your elements in a box. This way, you can center all elements at once and avoid styling issues.