If a file fails to upload to the Content Library, one of the following is usually the cause.
Unsupported file type
The Content Library only accepts specific file formats.
| Type | Supported formats |
|---|---|
| Video | .mp4 (preferred), .mov, .webm, .mkv |
| Image | .jpeg / .jpg, .png, .heic / .heif, .webp |
| GIF | .gif |
If your file is in a different format (e.g. .avi, .wmv, .tiff, .bmp), convert it to a supported format before uploading.
"Signature expired" error
If you see a "Signature expired" error, the upload session has timed out. Upload sessions are only valid for 2 hours. Leaving the Content Library page open for more than 2 hours without refreshing will cause this error.
Fix: Refresh the page. This starts a new upload session and your uploads will proceed normally.
Files that were successfully uploaded before the session expired are safe — they remain in your Content Library.