The latest versions of Facebook's Android app now allow users to save videos for offline viewing. The video is saved inside the app in the Saved section, and is not accessible independently to users.
The videos can be saved and viewed offline for as many times as the user desires and can also be deleted as per his/her wish.
"Saving" a video on Facebook means it's saved to users account, to the local copy of the Facebook app. It doesn't mean saving a copy of the video file to the user-accessible file system on phone or tablet.
The company might not be willing to provide the video file independently to its users in order to encourage sharing over its own social media networking site, however, it is anybody's guess what the actual reason behind this decision is. 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.
Earlier this month, Facebook said that it will start testing offline videos with a "small group of people" from July 11 in an email that was sent to page administrators for select media partners.
Earlier, YouTube also allowed users to download videos for offline viewing. However, users are required to re-sync the app in every 48 hours for it to verify that the video is not taken down by the uploader or the website. It will be interesting to see if Facebook also applies some restrictions to the downloading like YouTube did with its feature.