Multi-format Facebook Videos
The majority of Facebook users operate Facebook from their mobile devices, and vertical and square format videos are the most popular videos in mobile newsfeeds.
Typical formats include 9×16 (full vertical) used with Facebook and Instagram Stories and Facebook (Full Portrait), 4×5 used with Facebook, Instagram, and Twitter, 2×3 used with Facebook and 1×1 used with Facebook, Instagram, and Twitter (Square).
As the leading social network, embedding Facebook content is an important part of social media integration. Displaying your Facebook feed and Like button on your site boosts user engagement, improves your search rankings, and grows your business over time.