Flash Video is a container file format used to deliver video over the Internet using Adobe Flash Player (initially produced by Macromedia) versions 6–10. Flash Video content may also be embedded within SWF files. Support for video in SWF file format was added in Flash Player 6, released in 2002. In 2003, Flash Player 7 added direct support for FLV file format.
liveleak.com use flv video. HiDownload offer the "Flv Filter" to get the video's link, then download it.

Step-by-Step:

1.Download HiDownload and install, then run HiDownload.

2.Select "Tools -> Flv Filter" menu

3.Open "liveleak.com" website, and copy the video' link

4.Paste the link into URL editbox of "Flv Filter", and click "Go" button

5.Wait a jiffy, when video playing, you can find the video's URL in the list-box.

6.Copy the video's URL, and download it by HiDownload.

7.After video download finished. you can select the "Tools -> Streamingstar Converter" to convert to your iPhone/iPod/PSP/XBox