Artem made The course “Sell Stock Footage & Photography: upload, submit, keywords” based on my experience shooting the photos, keywording the stock media files, uploading and submitting them in the fast way . The course consists full of information how to write keywords, upload and submit them quite fast . You will get useful information about: – Stock agencies which you are gonna know to boost your sales . – Keywords prohibited to use: Did you know that there are some of these useful information and I want to share with you? Artem. Artem . Artem: “What you’ll learn in Sell Stock . Footage .Authentication failed. Unique API key is not valid for this user.