There are three video's available here. They demonstrate the spey cast.  You can click on the link and view the video on line or save it to your hard drive. If you do not have a broadband/cable internet connection the "save target as" option may be best.  This will enable you to play the file from your hard drive. The files are about or just under 1MB in size.

Single Spey High Lift.

Three Views Single Spey.