Every finished recording now has an Edit action alongside Share, Watch and Delete. It opens a simple editor: pause where you want an image to appear, click Add image, and pick one from your existing image library.
An image can be dragged and resized directly on the video, and stays visible for a time range you set on a timeline underneath - five seconds by default, or anything from a fraction of a second to the whole recording. Add as many images as you like, including several visible at once, and control which one sits on top with Send backward / Bring forward / Send to back / Bring to front.
None of this touches the original recording - the video file never changes. Edits are saved automatically and show up immediately for anyone watching the shared link. Downloading the recording produces an MP4 with the images baked in; changing an image after a download regenerates it the next time someone downloads.