I could find some tips:

---> http://answers.yahoo.com/question/index?qid=20100513121057AAJNrh1

---> http://www.sevenforums.com/tutorials/11738-thumbnail-previews-enable-disable.html

---> http://techsalsa.com/view-flv-3gp-and-other-video-thumbnails-in-explorer/

---> http://superuser.com/questions/409533/how-can-i-generate-thumbnail-previews-for-flv-fi...s-in-windows-7

---> http://social.technet.microsoft.com/Forums/en/w7itprogeneral/thread/f6b6793e-f63e-4fb8...3-d2b0b4b9711f

---> http://lee-jones.com/blog/view-flv-thumbnails-windows-xp-folder/

---> http://www.codecguide.com/faq_thumbnails.htm

---> http://shark007.net/tools.html

---> http://majorgeeks.com/Icaros_d7220.html


Thanks.


PS: I do not test these methods yet! I can't guarantee they will work for you or your PC properly! Test them by you own risk!

devil (johner)