How can I edit/add pictures or videos to my products?

Go to the Outlet Shops section.

Here click on the lower top navigation on My Store Account and below on My Outlets.

Then you will see your outlets, and here click next to your outlet on My Products.

Find a list of your products. You can also use the search if you listed many products.

Click on Dashboard next to the product you want to edit.

Here you can do the following:

Edit Info: edit the main info here
Overview: here you can edit the main description
Profile Picture: change your main product photo or edit the thumbnail
Photos: add additional photos of your product
Videos: add a video of your product, further below you have to choose Youtube or Vimeo and then add the link.
Meta Keywords: here you can add keywords for the meta search
Edit Style: not needed
History: find all past orders of this product here.

To view your product in the shop view, click on the View Product on top.