I am using zenphoto as zenvideo, using the flv player. It works when I click on the first video to play it, but if I go to another video, the video doesn't play, but the sound does. How do I solve this problem. If you want to look, the page is http://docdc.org/zenvideo I would really appreciate it, if someone could send me a quick response. Thank you soo much.

Seems to work fine for me. You might want to check your flashplayer plugin. (note with the coming 1.3 release the flv player plugin will become unsupported).