I have a video downloading, half completed, and can't find the temporary video file.
The folder DivX Movies / Temporary downloaded files exists but is empty, I have the option to show hidden files / folder enabled.
Divx Plus web player 2.2.0.52
Right click on the DivX Web Player.
Select "Preferences..."
Click "Cache" and "Open Cache" folder.
You can then copy/move DivX videos to any other location. Your cached movies are in there. Please note that incomplete videos have the .part extension.