- Setup Liferay with Xuggler for Video previews.
- Upload a small video file (A).
- Checkout that video file. Wait until a preview exists for this file.
- Upload a large video file (B).
- Before a preview is done generating for that large video file (B), edit the file and upload a small video file (A) and click "Save and Checkin".
The resulting preview will be of the large video file (B).