Environment:Google Pixel 3
Previews within the Previewer step do not load properly for audio or video blocks if the file is added from file system
- Add an audio or video block
- Click "Upload audio" or "Upload video"
- Click "Files" on the list of options for the file uploader
- Select an audio or video file, as appropriate
- Click "Continue" to go to the metadata step
- Click "Preview my story" to go to the previewer step
The media preview should appear and play properly
The preview is either blank (for an audio block) or shows the file is not found (for a video block.) See screenshots 2 and 3.