Unless you have an app installed that allows the capture of the streaming video, you can just
delete ALL temporary files. The file may actually of been deleted on rebooting the computer depending on your browser and other settings.
Easiest way to clean/ delete all temp files, logs, tracking cookies, etc. is to use a program such as
CCleaner. Be sure to note if anything like Google Toolbar or Yahoo Toolbar is offered during install and be sure to uncheck if you don't want it.CCleaner - PC Optimization and Cleaning - Free Download