Those that wish to try out the video thumbnail feature I can not ensure this will work but visit this link and download the precompiled binary file linked in this thread
http://www.photopost.com/forum/photo...l-support.html
As the instructions state upload it to a place on your server you wish and set the file to 777 permissions. You can then try it not by placing the proper server path to the file where asked in photopost. The precompiled binary I have works with most formats but not all. I have tried it with avi mpg and mov files mostly.