Depends on the video, if the video is also running off of Java I believe you run into problems.  Though Java can support two instances of it running I am not entirely sure on the process but from what I have found it is rather difficult to achieve.

Especially in snooker, when I open player info window and then close it, the area of the main game window being covered by it becomes black and nothing helps that... If I minimize the window and restore it back, it is all black, while the game is still running (I hear the sounds). Maybe it is a common problem. Do you encounter problems with player info window also?

tenia el java pero cambie mi disco duro y luego trate de voverlo a bajar y lo bajo pero ya no me habrio la pagina de flyordie que hago

with java, i would change versions, either to higher or lower version, by installing it, then going to the control panel and choosing that version to use with your browser : start/control panel/java/java tab/view/check the version you want to use/apply/ok; might also delete the cache while you're there: java/general tab/delete files/apply/ok  p.s.check to see first if there's already another version to use, so you don't have to install another java version.