i have created an experiment with opensesame which contains videos. The problem is that i cannot run the experiment on my pc, except i delete the videos. When i do that, the experiment runs. On all other pcs, i download opensesame and run the experiment on an usb-stick with the videos without any problems. I downloaded opensesame once again on my pc but i still doesnt work, although my pc is new and all the videos run with for example vlc-player. I always adjust "legacy" . So it has to concern the videos in my experiment but i dont understand the error message. I send you the picture of the message. I hope you have an idea.