associated attached download downloaded downloading file files gallery instructions photo problems product products seperatley third uploaded video working zip

I am having problems downloading associated files with my other products. I have uploaded a video and photo gallery seperatley the gallery is in a zip file. I would would like the gallery to be downloaded with the video. I read the instructions on how to do this but it is still not working. I can download the video but the gallery file is not attached at all. What do I do?

As instructions say, you need a "third" product where you will need to add both these products.