It's important to note here that you cannot directly upload a video file from your computer. It's just not practical. We suggest you upload your video to You Tube, Vimeo then link it over to your Apostrophe website. Video services are better equipped to handle those massive files.
By annotating the media, you can organize your media library. This will help when you're searching for media to place around the website. You have the choice to annotate the files when you first upload them to the media library, or after they are already uploaded by clicking the pencil icon.