Watch DivX Movies Online

Im tryin to watch a movie online, and its telling me i have to download that to be able to watch the movie, just wondering what its for, and if its safe to download it? I dont wanna download it if its gonna bring me viruses, or any other troubles to my computer.

I watch divx movies (.avi files) with my Thai wife so we need Thai subtitles. I downloaded .ssa and .srt files but the problem is that the Thai language is not properly showing. The subtitles look like this :

πÁª◊èÍ àÇÊÅÕ ¡Ôê»ÊÑ’

I’m using Windows Vista and I have no problems reading Thai websites, I can even type in Thai…

Anyone can help ?