is there any way to put a video clip as a screensaver?

Answer 1

https://www.microsoft.com/globaldev/outreach/dnloads/CHS_VideoScreensaver.mspx

Free from M$. It jumps to a Chinese Microsoft site, but the d/lk button is in the top right of the page.
Once downloaded, The acceptance is in Chinese, but just hit enter and the buttons with (N) for next.
It gives a free video screensaver of CHina, but you can easily change to personal vid's under settings.

Answer 2

http://www.tcsoftdev.com/videoss.htm

This is a freeware video screensaver