Click on the table headers to sort the rows.
Click in a cell to edit the data.
After editing the "thumbnail" field, refresh the page.
For the purposes of this demo, the filename must be in .jpg format.
The filename will have changed, but it can still find the file.
Note: There are a few conditions that will throw this demo off. This is a list of images that exist in this directory, so you can "find" them again by changing the thumbnail field to match, then refreshing the page.