Adds a preview button for videos on SxyPrn. Unlike the regular previews which may or not show sometimes, these previews are always shown (not guaranteed to play, though) You can also control these previews; even view them fullscreen. You can also open the previews in a new tab.
To download the preview:
1. Click the play button
2. Right-click the video
3. Select "Save Video As.." (might be different in different browsers)