Thanks for sharing the file! The problem turned to be a quite easy case. The original name of the video file, 3Dmotion_CDOT_30hz_Fs1Hz_15%_3TR_NEW.avi, contains the special '%' character. While it's all right for the file system, the video encoder in EventIDE fails in reading such link. In contrast, if you export the same file to the Material Library, the file is automatically renamed by EventIDE and the '%' character is removed.
To solve this problem, you can rename the original file manually, e.g. to 3Dmotion_CDOT_30hz_Fs1Hz_15per_3TR_NEW.avi. Then will work as a video link.