There are always two options: creating a mobile app or web application or creating a mobile website or use web responsive design.
Therefore, what's the problem with the web design you might ask? Well, leaving aside the Flash and video. These elements are not in the snapshot, directly affecting web design. How to solve the problem of Flash with instant preview? For now there is a direct solution to the level of programming or web design. The only option is to work at web design with background images. If for example you have a Flash in a cell, simply put an image as a background substitution of the cell.