When Chrome and other browsers save an HTML5 video, the video is saved to the user-accessible file system, while in the case of Facebook, the downloaded file stays only in the app and is accessible only from the bloated and annoying interface. The videos are saved inside the app in the saved section, and is not available independently to users.
Facebook for Android is showing a "Save video" option in the dropdown menu of a Facebook video post.
Videos can be watched offline once saved and removed at any time. Facebook Live video button was now enabled for users across the world on Android and iOS as part of the company's overall plan to boost revenues and engagement on the social media website through videos. It seems in line with what company's like Google have been doing with YouTube in developing nations like India, where a save for offline viewing option is present to combat mobile data woes. The option is similar to YouTube's offline feature, that lets users save some videos on the app to watch them later. So you can save those viral videos or videos from your favourite pages for offline viewing at a later stage.
Facebook already said it would be deploying the feature to selected people. As per the website, Facebook would not let users download the videos directly on the device storage in order to make them stick with the social media service.