Using the Versions tab
Supported images and videos will be automatically encoded to a supported format when uploaded to ftrack. See Upload files from the web interface.
Using the Upload media for review dialog
To upload new media and create a new version in ftrack use the Upload media option available in the Tasks spreadsheet context menu, the More menu in the sidebar or the context menu in the project outliner.
Drag and drop or select a file for each of the upload areas and fill in the fields. When you have filled in all fields and the files have been uploaded, the Create and Create and review buttons are enabled. Hit Create to publish the new versions and close the window. Create and review will publish the versions and launch the ftrackreview web player for the newly created versions.