Please help me,thank you very much~

I tried one at random and it was fine.

me too. care to elaborate more on the prob?

Specifying which video would help too. Is it just one or many?

you're missing a plug-in.

Flash player or something. Damn Vista, Still can't find half of my files XD

I just checked for myself and its working fine so if your having problems with it then as Dejitaru Ryuu has already said your missing a plug-in probably the latest flash player.

Here's a link just in case you haven't dled it yet.
http://get.adobe.com/flashplayer/

Open this link. The video doesn't work?

Maybe he means the hentai that's on the site?

What I linked?

Still not working? Try a bunch of codecs then, click on the link "ffdshow - Beta 6":
http://ffdshow-tryout.sourceforge.net/download.php

Only dl this if you haven't dled it before and if this still doesn't work I'm not sure what the problem would be. But this would really increase the quality of your video watching online and on your own computer either way.

Well I can't go all technical because I don't know how to say it but there like add-ons to your wmv or w/e to make the video/sound quality of w/e movie your gonna watch alot better. I don't know the problem your having so I'm just kind of guessing that the reason why the videos won't play for you might have to do with you missing a codec or something since you installed the latest flash and your still having problems.

First of all the watch online to my knowledge is flash, which means you do not need any codecs to play them, you only need the ability to play flash.

I can't properly assess your situation if you won't be a bit more detailed than you are, above all else a screenshot of the page the video is on would be helpful, as we could then see if it's even loading, broken, etc.

Another piece of helpful information would be which browser you're using.