Basically, items like videos and Flash require a plug in that displays and controls the item in the browser. Therefore, the browser dedicates that area of the object to the plug in and anything that may overlap that item will be placed beneath it. In run/preview modes or when publishing to CD or EXE, Lectora is capable of controlling the layering, hence it working for you in Lectora but once the browser takes control of it, it will control the layering of such objects.Basically, items like videos and Flash require a plug in that displays and controls the item in the browser. Therefore, the browser dedicates that area of the object to the plug in and anything that may overlap that item will be placed beneath it. In run/preview modes or when publishing to CD or EXE, Lectora is capable of controlling the layering, hence it working for you in Lectora but once the browser takes control of it, it will control the layering of such objects.