Facebook doesn’t want you to burn through your mobile data plan just to keep watching its videos. That’s why it’s testing a new feature called Instant Videos that downloads and caches Facebook videos to your phone while you’re on Wi-Fi so you can watch them later on the go for free. Users will see lightning bolt icons on pre-loaded videos.
The Instant Video feature is reminiscent of Instant Articles, Facebook’s hosted content format that loads much faster than mobile websites so users don’t drop off waiting for a publisher’s articles to appear. Because videos load even slower than web pages, publishers might be keen to get involved to ensure maximum viewability for their clips.
For more visit: https://techcrunch.com/2017/09/11/facebook-instant-video/