I have 3 youtube accounts, but for some reason I can't find how to change it so that I can send videos to all 3. At the moment I can only send videos to one account but I do remember a pop up window asking what my username and password was for my youtube account. Any idea where I can find that?
In the "Online" menu (Movie Edit Pro 15 Plus), you can manage and change the login details for the different online services the program can connect to. However, there isn't really any provision for managing several different YouTube accounts. So, if you want to upload to different accounts, you'd either have to change the login details in the program in between uploads or just render the videos from the program via the "Export movie" function ("File" menu) and not use the automatic upload function. Then, log into the desired YouTube account and upload the video(s) there.