Rather than a video, consider posting your capx so that other may check the way you setted your project and if they experience the same issue.
First thing, I'd recommand to use either firefox or chrome as browsers.
IE is not up to the task of HTML5 gaming as its competitors.
Secondly make sure your graphic drivers are up to date.
AS for the project itself, hard to say without the capx, I'd advise you to check the layout/layers scale (the character appears far smaller in preview, but once again I don't know your settings). Check also the visibility of the layers, the parallax settings so that they are coherent.
Make sure the objects are on the top layer, that this layer is visible and that their property "Initial visibility" is set to "Visible"