The feature "Upload attachments to a video" must be booked separately. It might not be available in your VideoManager. Please contact your administrator for further information.
The video asset management provides a way to create different attachments to a video. The management of your video collection can be arranged very comfortably: if, for example, external production companies produce video footage, you can make available additional information to this video - such as invoices, licenses, etc.
Depending on which document types your administrator has set up, you can upload file attachments for this purpose and always replace or delete again.