Each facet can contain one piece of visual media: either an image, or a video.
To add an image or video to a facet, enter note editing mode, and tap the green + button next to the image/video row. You will be prompted to choose an image or video from your photo library, or use your device’s camera.
If you copy an image in another app, you can paste it into a facet. A new option, Paste from Clipboard, will appear when you tap the + button.