All the content uploaded in your channel will appear in the Manage Content page.
From here you can access the Upload Content page by clicking on the Upload New Content button. You can search for content by using the search bar and adding filters to it, as seen in the image above.
This way all your content is organized in one page for easy access. If you're a lil confused about what the symbols on the video thumbnails mean, read here.
Enjoy uploading and collaborating your content in the Private Media Channel.