Use the content media library
Attach JPEG, PNG, GIF, or one MP4 from the library or Upload, then use those files on the draft.
3 steps · About 3 minutes
Open the draft
Open KB Feedback Sample. Above the body, + Upload opens the media library. Images you already attached show next to it. You cannot mix a video with images on the same piece.

Open Media library
Click + Upload. Media library has Gallery (files already in the workspace) and Upload. Gallery is empty until someone uploads. Select files in Gallery, then Select N media file(s).

Upload a file
Choose Upload. Drag JPEG, PNG, or GIF (up to 5MB) or one MP4 (up to 1GB), or add a file here. From the editor, an upload attaches at once. Other formats are rejected. Remove a thumbnail on the draft to detach it. + Generate media is not available yet.

FAQ
Gallery says there are no images or videos.+
Nothing has been uploaded to this workspace yet. Use Upload, then the file appears in Gallery for later drafts too.
I cannot select a video, or I cannot select images.+
A piece can have images or one video, not both. Remove the other type first.
The upload failed.+
Use JPEG, PNG, GIF, or MP4. Images must stay under 5MB. An MP4 must stay under 1GB.