Cannot view inline posted videos

For the last 3 weeks I have not been able to view inline poste Youtubes videos here on the forums. I use I.E. 9.0.8112.16421 with Windows 7. For the last three weeks any posted video shows a black rectangle with a red circle and a grey arrow in the middle of the circle. I am not able to click on it to start the video and there is no link to Youtube. But I can go to Youtube directly and videos play just fine. I can also view inline posted videos on other sites just fine. Is this a problem with the forum software the u

ses or is it a problem with my machine?

Could you link me some example threads and will give it a review using my IE here also on this machine. Thanks and look forward to talking more.